CS GUIDE OTA VSP

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User Guide
Laird OTA VSP Application
Version 1.0

Laird OTV VSP Application
User Guide

REVISION HISTORY
Version

Date

1.0

Notes

Contributors

Approver

Initial version

Ja mie M c cr a e

Jonathan Kaye

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CONTENTS
1

Overview ............................................................................................................................................................................. 5
1.1

Requirements ............................................................................................................................................................ 5

1.2

Downloading and Installing ....................................................................................................................................... 5

1.2.1

Linux ..................................................................................................................................................................... 5

1.2.2

Mac ...................................................................................................................................................................... 6

1.2.3

Android ................................................................................................................................................................ 6

1.2.4

iOS ........................................................................................................................................................................ 6

Next ..................................................................................................................................................................................... 7
2.1

Application overview ............................................................................................................................................... 10

2.1.1

Main Screen – Not Connected ........................................................................................................................... 10

2.1.2

Main Screen – Connected .................................................................................................................................. 11

2.1.3

Settings Screen ................................................................................................................................................... 12

2.1.4

File Selection Screen .......................................................................................................................................... 13

2.1.5

Scan Selection Screen ........................................................................................................................................ 14

Transferring Files to Target Phone/Device........................................................................................................................ 15
3.1

iOS ............................................................................................................................................................................ 15

3.2

Android .................................................................................................................................................................... 18

Enabling Command Mode Hardware VSP ......................................................................................................................... 19
4.1.1

BL600 ................................................................................................................................................................. 19

4.1.2

BL652 ................................................................................................................................................................. 20

4.1.3

BL654 ................................................................................................................................................................. 20

4.1.4

BT900 ................................................................................................................................................................. 20

4.1.5

RM1xx ................................................................................................................................................................ 21

Performing an OTA Application Download ....................................................................................................................... 22
5.1

Enabling Command Mode Hardware VSP................................................................................................................ 22

5.2

Connecting to the Device ......................................................................................................................................... 22

5.3

File Selection ............................................................................................................................................................ 23

5.4

Downloading ............................................................................................................................................................ 24

Retrieving module information ......................................................................................................................................... 25
6.1

Enabling Command Mode Hardware VSP................................................................................................................ 25

6.2

Connecting to the Device ......................................................................................................................................... 25

6.3

Retrieving Module Information ............................................................................................................................... 27

Configuration Options ....................................................................................................................................................... 28

Enabling Data Length Extensions for faster downloading (v4.2+) .................................................................................... 31

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8.1

Enabling DLE on BL654/BL652 ................................................................................................................................. 31

8.2

Enabling DLE on the OTA VSP Application ............................................................................................................... 33

8.3

Downloading an application with DLE enabled ....................................................................................................... 33

8.4

Disabling DLE on the OTA VSP Application .............................................................................................................. 33

8.5

Performance Analysis .............................................................................................................................................. 34

Known Issues ..................................................................................................................................................................... 34

Tested Devices .................................................................................................................................................................. 35
10.1

Android .................................................................................................................................................................... 35

10.2

Linux......................................................................................................................................................................... 35

10.3

iOS ............................................................................................................................................................................ 35

10.4

Mac .......................................................................................................................................................................... 35

Online XCompiler Service Privacy ..................................................................................................................................... 36

License Information .......................................................................................................................................................... 36

Acknowledgements ........................................................................................................................................................... 48

Additional Documentation ................................................................................................................................................ 57

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1 OVERVIEW
The Laird OTA VSP application is a cross-platform open-source utility that allows for XCompilation and loading of
smartBASIC application files to Laird’s range of wireless Bluetooth modules including the BL600, BT900, BL652, BL654, and
RM1xx products. This user guide describes how to use the application to program a module and explains the functionality
offered by the application.

1.1 Requirements
The requirements for using this application are shown in Table 1.
Table 1: Application requirements

Android

Linux

Mac

iOS

CPU Architecture

ARM v7a or newer,
x86 with ARM v7a
compatibility

x86, x86_64
or ARM v7a

x86_64

ARM v8a or newer

OS version

4.4 Kitkat or above

Kernel 4.0 or above
with BlueZ 5.0
or newer

10.10 Yosemite
or newer

11 or above (source code
compiles and runs on 9.0
or newer)

Bluetooth version

4.0 or newer

Minimum RAM
System packages

4.0 or newer

1 GB

512 MB

1 GB

512 MB

–

BlueZ, glib

–

Laird offers a Bluetooth v4.2 USB adapter for Android and Linux devices, the BT851. Further details on the BT851 adapter
can be found on the product page: https://www.lairdtech.com/products/bt850-usb-ble-module

1.2 Downloading and Installing
The Laird OTA VSP application can be found on the iOS and Android application stores. Search for Laird OTA VSP to find and
install it.

1.2.1 Linux
To install on Linux, follow these steps:
1.

Download the latest version from the Releases page on the Github project page:
https://github.com/LairdCP/Laird_OTA_VSP/releases

Open a terminal utility and change directory to the folder in which the file was downloaded to:
cd Downloads

Extract the archive:
tar xf OTA_VSP.tar.gz

Qt-based Bluetooth applications need a special permissions flag set to retrieve the type of address when scanning for
device. To set this permission, the executable must not be on a temporary file system or one that prohibits use of
setuid. You must enable this permission using the system’s root account and the full patch to the executable (relative
paths do not work):
sudo setcap cap_net_admin,cap_net_raw+eip /home/user/Downloads/OTA_VSP

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Or
su

setcap cap_net_admin,cap_net_raw+eip /home/user/Downloads/OTA_VSP
exit
The application can now be launched:
./OTA_VSP
If you see a message similar to the following in the terminal when launching the application, the permission flag was not set
and connecting to devices will not work:
qt.bluetooth.bluez: Missing CAP_NET_ADMIN permission. Cannot determine
whether a found address is of random or public type.
Ensure that the executable is located on a drive that supports setuid and that the flag is set. You can verify that the flag is
properly set using the following:
getcap /home/user/Downloads/OTA_VSP

1.2.2 Mac
To install on Mac, follow these steps:
1.

Download the latest version from the Releases page on the Github project page:
https://github.com/LairdCP/Laird_OTA_VSP/releases

Mount the archive and drag the application file to the Applications folder or any other location (such as the Desktop).

The application can now be launched like any other application.
Upon attempting to launch the application, Gatekeeper might show a warning message saying that application execution
was denied, to allow execution…

1.2.3 Android
The Laird OTA VSP application can be installed directly from the google play store by using the following link:

Alternatively, the latest version of the APK can be found on the Github releases page:
https://github.com/LairdCP/Laird_OTA_VSP/releases

1.2.4 iOS
The Laird OTA VSP application can be installed directly from the App Store by using the following link:

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www.lairdtech.com/bluetooth

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2 NEXT
Upon opening the application on Android, a dialogue box requests access to the device’s coarse location and external file
access. These are required to use Bluetooth functionality. To access files on the device to be transferred to the target
modules, accept both options by tapping the Allow (Figure 1 and Figure 2).

Figure 1: Read file permission

Figure 2: Coarse location permission

If either permission request is denied, then the application is non-functional (Figure 3).

Figure 3: Permission denied, application non-functional

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If this occurs, you will need to grant permission by doing the following:
1.

From the Settings application, tap Apps (Figure 4).

Figure 4: Settings view

Scroll down and tap Laird OTA VSP (Figure 5).

Figure 5: Apps view

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From Laird OTA VSP, tap Permissions (Figure 6).

Figure 6: App settings view

Ensure both permission requests are allowed (Figure 7).

Figure 7: Permissions view

The application should now function properly.

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2.1 Application overview
The following images detail the elements of the user interface in each state of the application.

2.1.1 Main Screen – Not Connected

Information display for sent/received data

Click to clear the display

Destination file name on module

Click to begin advertising BLE device search

Busy icon indicator (spinning icon = busy)

Application status bar and version
information

Click to open the file selection dialogue

Selected file source name

Selected file (in bytes)

Click to open the Settings form

Click to cancel pending operation/action

4
10

5
6

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2.1.2 Main Screen – Connected
1

Click to disconnect from the connected
device

Application status bar showing Tx/Rx and
download statistics

3
4

Click to start XCompiling (if a source file) and
downloading the application to the module
Click to query the module to return the
type, firmware, and storage information

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2.1.3 Settings Screen
VSP Service UUID
Tx UUID Offset
Rx UUID Offset
MO UUID Offset
MI UUID Offset
Packet/MTU size
Only show devices
advertising VSP service
More compatible BLE
Scanning
Delete Existing File
Check for sufficient free
storage space
Verify file checksum
(on supported devices)
Skip download display
Scrollback lines
(0=unlimited)
Allow Online
XCompilation
Use SSL for Online
Compilation
Check for latest
firmware when querying
After Successful
Download
Embedded error code
database version

Filter devices by those advertising VSP service
(Android) May resolve scanning issues on some
devices
Delete existing application before downloading
Check module has enough space to store
application
Verify file was downloaded successfully with a
checksum
Do not display writing commands on log window
Number of lines to display in log window
Allows use of the online XCompilation service
Enable SSL when using the XCompilation service
Queries the Laird site for the latest firmware
when
Do nothing, disconnect from module, or restart it
once an OTA is completed
Version of the embedded error code database

Click to save the current settings

Click to restore all settings to their defaults

Click to view application information

Click to discard any changes you made

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UUID of VSP service
VSP Tx characteristic UUID
VSP Rx characteristic UUID
VSP MO characteristic UUID
VSP MI characteristic UUID
Only adjust when using supported devices

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2.1.4 File Selection Screen
Determine where to retrieve the OTA file from:
▪ Local file
▪ Remote URL – (HTTP/HTTPS) Copy the location to your
computer clipboard and click Paste to enter it as the URL.
Click OK to continue or Cancel to stop the file-selection process

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2.1.5 Scan Selection Screen
List of detected advertising BLE devices – Displays Bluetooth
address, device name, and RSSI.
Note: For Mac/IOS, there is no Bluetooth address.
Click Connect to connect to the selected device or Cancel to
stop scanning or connecting to the device.

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3 TRANSFERRING FILES TO TARGET PHONE/DEVICE
The OTA VSP application supports smartBASIC source files (.txt and .sb file extensions) and XCompiled smartBASIC
applications (.uwc file extension). On Linux/Mac, a file selection dialogue allows a file to be opened from any directory on
the computer or a network drive (if mounted). For mobile devices however, the files must be transferred to the device to
use them.

3.1 iOS
Use the application storage function from iTunes to transfer files directly to the application. To do this, follow these steps:
1.

Connect your iOS device (with the Laird OTA VSP application pre-installed) to your PC.

Open iTunes and select the iOS device button (Figure 8).

Figure 8: Selecting the iOS device

From the iOS device view, select File Sharing (Figure 9):

Figure 9: Selecting the file sharing option

In the file sharing view, find and select Laird OTA VSP from the applications with file sharing abilities (Figure 10).
From this view, you can manage files available to the application.

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Figure 10: Selecting the Laird OTA VSP application

Click Add to transfer a file from the PC to the iOS device (Figure 11).

Figure 11: Adding a file to the application

Navigate to the file location on the computer and select the file to add it to your iOS device. Both smartBASIC source
files (.sb/.txt) and applications (.uwc) files can be added.

Once finished, click Done in the bottom right of the iTunes window (Figure 12).

Figure 12: Finished adding files

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Eject the iOS device from the PC as shown in (Figure 13).
You can now open the application and use it with the transferred files, as desired.

Figure 13: Ejecting the attached iOS device

Alternatively, the OTA VSP client supports selecting files from external applications using the Open with… file action. This
allows you to select smartBASIC source and application files from cloud storage applications, email clients, and many other
types of applications.
To use this feature, follow these steps:
1.

Select the desired file from the application and select open with Laird OTA VSP.
If there is only an Open with… option, select this and then select Laird OTA VSP. (refer to Figure 14 and Figure 15).

Figure 14: Using "Open In..." Option

Figure 15: Opening file in OTA VSP application

Once the application opens, you should see that the file is loaded and is ready for XCompilation/download. If an error
occurs whilst attempting to open the file, the error message will display.

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3.2

Android

Android has a plugin-based file selection system which allows a file on the device to be chosen. Other applications can also
add selection locations for selecting files from cloud service providers (such as OneDrive, Dropbox, and Google Drive). To
use these providers, you must install the application from the play store and configure it with your user account details –
you can then choose it from the file viewer.
Alternatively, files can be stored on the Android device’s filesystem. To transfer files to the device, follow these steps:
1.

Plug it into a computer with a USB cable. A notification displays which may indicate that the device is in a charging
mode.

Select USB for charging (Figure 16).

Figure 16: Switching USB modes

Select File transfers (Error! Reference source not found. )to allow file system access from the connected computer.

Figure 17: Switching to file transfer mode

A drive displays on the computer under the list of portable devices (Figure 18). We recommend that you create a
unique directory within this drive for the OTA files that you transfer (Figure 19).
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Figure 18: Android filesystem attached to PC

Figure 19: smartBASIC files on Android device

4 ENABLING COMMAND MODE HARDWARE VSP
The first step to communicating with a module using VSP is to enable command mode hardware VSP. Unlike software VSP
(which can be used as part of an application), hardware VSP is entered at startup by the firmware.
There are two types of VSP:
▪
▪

Bridge mode – All data sent/received over VSP is transmitted to the UART without any interpretation by the module.
Command mode – The VSP interface acts as a second transparent UART interface which allows commands to be
issued as if the module’s UART is connected to a PC in interactive mode.

The steps for entering command mode hardware VSP depend upon the module used. VSP can be enabled on Laird’s DVK
development boards or on customer designs if the required pins can be set to the required state.

4.1.1 BL600
To enable command mode VSP on the BL600 (Figure 20):
▪
▪
▪

SIO_7 must be bridged to Vcc,
The autorun pin (SIO_28) must be set to nAutoRUN (low)
If using OTA on a DVK, the USB_DTR – Autorun pin on CON12 must be switched off

Figure 20: BL600 DIP switch and jumper positions

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4.1.2 BL652
To enable command mode VSP on the BL652:
▪
▪

Autorun (SIO_13) must be set low
SIO_2 must be set high

This is achieved on the DVK by removing the jumper from J12 and putting a jumper on J5 as shown in Figure 21.

Figure 21: BL652 jumper positions

4.1.3 BL654
To enable command mode VSP on the BL654:
▪
▪

Autorun (SIO_35) must be set low
SIO_2 must be set high

This is achieved on the DVK by removing the jumper from J12 and putting a jumper on J5 as shown in Figure 22.

Figure 22: BL654 jumper positions

4.1.4 BT900
To enable command mode VSP on the BT900 (Figure 23):
▪
▪
▪

The nAutoRun pin (SIO_22) must be set low (autorun)
SIO_19 set low (use a jumper wire on the DVK)
If using OTA on a DVK, the USB_DTR – Autorun pin on CON12 must be switched off

Figure 23: BT900 DIP switch and jumper positions
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4.1.5 RM1xx
Although there are two types of firmware on the RM1xx, only the peripheral firmware supports VSP mode. You can convert
a module with the central firmware to one with peripheral firmware by using either a Laird QPK or a Segger JLink. See the
Programming RM1xx Modules with the QPK-NRF5x-01 application note which is available from the RM1xx product page of
the Laird website – https://www.lairdtech.com/products/rm1xx-lora-modules
To enable hardware command mode VSP on the RM1xx:
▪
▪
▪

Set Autorun (SIO_25) low
Set SIO_28 high
For the DVK, remove the DTR jumper from J10, place a jumper on J12 pins 1-2 and connect pin 1 of J6 to Vcc (3v3) as
shown in Figure 24.

Figure 24: RM1xx jumper positions

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5 PERFORMING AN OTA APPLICATION DOWNLOAD
5.1 Enabling Command Mode Hardware VSP
Please follow the section labelled Enabling Command Mode Hardware VSP to enabled command mode hardware VSP on
your target module before proceeding with the next step.

5.2 Connecting to the Device
To connect the device, follow these steps:
1.

After enabling VSP, open the Laird OTA VSP application.

Apply power to the module (or press the reset button on the board if it already has power).

Start scanning for devices by clicking Scan. Your module name should appear in the list of devices (Figure 25).

Note:

VSP advertises for ten seconds after the module starts. You may need to press the reset button to restart
advertising.
Select the target device and click Connect. The application will attempt to connect to the selected module.

Figure 25: Target module selected

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5.3 File Selection
To properly select a file, follow these steps:
1.

Once connected to the module, select a file to load by clicking … (Figure 26).

Figure 26: Connected to module

Select between loading a file off the local device or downloading a file from an internet location (Figure 27).

Figure 27: File type selection

Select local file and click OK.
On Linux/Mac, this opens a generic file selection dialog. On Android, this opens the Android file selection dialog
(Figure 28). The top left lines display a list of file providers (local device or cloud service providers).

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Navigate to the desired file and select the application.

Figure 28: Android file selector

5.4 Downloading
To download the selected file, click Download.
Note:

Prior to download, the application filename, when saved to the module, can be customized by editing the
Download filename (Figure 29).

Figure 29: File selected, ready to download

If a smartBASIC source file was selected and the online XCompilation option enable in Settings, the download process of the
device to the module begins. The length of time of the download varies depending on the device you are using and the size
of each data packet.
Once the process has completed, a message displays its completion (Figure 30). The device remains connected or it
disconnects and restarts the module (depending on which option you chose in the Settings). The application can now be run
on the module as needed.

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Figure 30: Successful OTA

If an error occurs, the error message and a description display on-screen (Figure 31). The most likely cause of an error is a
full filesystem on the module. This can be erased by issuing the at&f 1 command via a UART connection to the module.

Figure 31: OTA failed

6 RETRIEVING MODULE INFORMATION
6.1 Enabling Command Mode Hardware VSP
Please follow the section labelled Enabling Command Mode Hardware VSP to enabled command mode hardware VSP on
your target module before proceeding with the next step.

6.2 Connecting to the Device
To connect to the device, follow these steps:
1.

After enabling VSP, open the Laird OTA VSP application.

Apply power to the module (or press the reset button on the board if it already has power).

Click Scan to start scanning for devices.

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The name of your module should appear in the list of devices (Figure 32).

Note:

VSP advertises for ten seconds after the module starts.
You may need to press the reset button to restart
advertising.

Figure 32: Target module selected

Select the target device and click Connect. The application attempts to connect to the selected module.

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6.3 Retrieving Module Information
To retrieve module information, follow these steps:
1.

Once connected to the target module, press Query (Figure 33) and wait for the response.

Figure 33: Connected and ready to query

This command queries various information from the module including available storage space, device type, and
firmware version. If Check for latest firmware is enabled in Settings, the latest firmware supported on the module is
also queried.
Once the module responds, the following information displays (Figure 34).

Figure 34: Module information

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7 CONFIGURATION OPTIONS
There are many configuration options available in the settings page of the OTA VSP application which can be used to fine
tune the OTA process ().
Table 2: OTV VSP application configuration options

Option

Description

VSP Service UUID

The UUID of the VSP service
Note: Currently, you cannot change this on any modules. It is
reserved for possible future use.

Tx UUID Offset
The characteristic UUIDs of the VSP service
Note: Currently, you cannot change these on any modules. They
are reserved for possible future use.

Rx UUID Offset
MO UUID Offset
MI UUID Offset
Packet/MTU (Maximum Transmission Unit) Size

The number bytes sent per each characteristic write.
Note: Do not change this from the default value of 20 unless your
device supports a larger MTU or DLE (data length
extensions) and you have configured the target module
correctly.
Not supported on BL600, BT900, RM1xx, or BL652 firmware earlier
than version 28.7.3.0.
To configure the BL652/BL654, you must enable larger attributes
using the following commands:
at+cfg 211 247
at+cfg 212 244
at+cfg 214 1
at+cfg 216 251
atz
After performing this process and connecting with a supported
device, you should be able to increase the value and transfer
applications to the module at a faster rate. If you get errors when
increasing this value, set it back to the default value of 20.

Only show devices advertising VSP service

If this option is enabled, filtering is performed on discovered
Bluetooth Low Energy (BLE) devices. The devices only display if they
are advertising the VSP service UUID.
This option may cause issues and slow discovery, especially if the
service UUID is in the scan response and the Bluetooth adapter is
performing a passive scan. In this case, disabling this option may be
beneficial.

(Android) More compatible BLE Scanning

Rather than force the device to start scanning for BLE devices, with
this option it searches for all Bluetooth devices and only filters them
when device information has been retrieved.
Enable this option if your device has problems discovering modules.

Delete existing file

If enabled, this overwrites existing files on the module to prevent it
from failing if an application already exists with the same filename.

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Option

Description

Check for sufficient free storage space

If enabled, this checks that the module has sufficient space to store
the application before starting the download process. It prompts a
warning to continue if it doesn’t have enough space.

Verify file checksum (on supported devices)

If enabled, this confirms a successful download by verifying that the
downloaded file checksum matches it’s expected value.
The BL6xx is supported and the BT900 with firmware greater than
or equal to 9.1.12.8 is supported.
If disabled or unsupported, it only checks that the module has a file
with the specified download filename.

Skip download display

If enabled, it skips displaying the file data sent to the module in the
log window. This slightly speeds up the file download process.

Scrollback lines

This option selects the number of display lines to keep in the buffer
before discarding them.
0 = not discarding any.

Allow online XCompilation

If a smartBASIC source file is selected for download (.sb or .txt file
extension), it is XCompiled for the module using the online
XCompiler service. This service allows one file to be loaded to
multiple different modules or firmware versions without needing to
XCompile them on a computer beforehand.
Note: Special or engineering firmware versions may not be
supported by the online XCompilation system. If this is the
case, an error is reported on the device and a pre-compiled
.uwc file must be used instead.
Refer to the Online XCompiler Service Privacy section for privacy
information when using this service.

Use SSL (Secure Sockets Layer) for Online
XCompilation

This option enables using SSL when communicating with the online
XCompilation server. This ensures that the data transmitted and
received is encrypted.
Note: This option should be disabled in countries where encryption
is not legal. Laird takes no responsibility or liability for
customers that enable this where it’s use is prohibited.
Refer to the Online XCompiler Service Privacy section for privacy
information when using this service.

Check for latest firmware when querying

Allows checking that the module is using the latest available
firmware when a query command is used. It does this by
transmitting the module type and firmware version to the online
XCompiler service.
Refer to the Online XCompiler Service Privacy section for privacy
information when using this service.

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Option

Description

After successful download:
▪
Do Nothing
▪
Disconnect from module
▪
Restart Module

Configures what action should be taken after a successful OTA
download. It either does nothing (keep the application connected
to the device), disconnects from the module, or restarts the
module.
If an application is downloaded as $autorun$, it begins executing on
reboot assuming that the autorun pin is set to the correct logic
level.
This option only applies to successful OTA downloads, if an OTA fails
then the application will remain connected.

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8 ENABLING DATA LENGTH EXTENSIONS FOR FASTER DOWNLOADING
(V4.2+)
Packet Data Length Extensions is an optional feature of Bluetooth Low Energy version 4.2 and newer. It allows messages
exchanged between devices to have a larger transmissions size and therefore a faster throughput.
Note:

This is an optional feature. Not all Bluetooth chipsets support it. Ensure that your device supports this feature
before attempting to use it.

Laird offers a Bluetooth v4.2 USB adapter for Android and Linux devices with support for DLE – the BT851. Further details
on the BT851 adapter can be found on the product page: https://www.lairdtech.com/products/bt850-usb-ble-module
Enabling DLE only works with a BL654 module or BL652 module with firmware greater than 28.7.3.0. It must be disabled to
communicate with other modules or with devices that do not have DLE enabled.
Note:

There is an issue on firmware 28.7.3.0 when using Bluetooth v5 radios #12647. If you are using a v5 radio, please
use a newer firmware).

Note:

On some devices that do not support DLE, enabling a larger packet size makes use of long characteristic writes –
multiple fragments of a packet are sent over the air and reassembled into one write by the other device. This may
improve performance of transferring data.

8.1 Enabling DLE on BL654/BL652
The target BL652/BL654 must be connected to a computer to adjust the module’s configuration using a utility such as
UwTerminalX. Refer to the documentation on the BL652 product page or BL654 product page for information on how to
communicate with the module.
Send the following commands to the module in interactive command mode to set the module to enable use of DLE and
restart the module:
at+cfg
at+cfg
at+cfg
at+cfg
atz

211
212
214
216

247
244
1
251

Note that this configuration is global and applies DLE configuration to any applications which are loaded to the module. It is
possible to disable DLE from inside an application if desired using code like the following:
#define
#define
#define
#define

ATTRIBUTE_MTU_KEY_ID
ATTRIBUTE_DATA_LENGTH_KEY_ID
ENABLE_HIGH_BANDWIDTH_KEY_ID
BLE_MAX_PACKET_LENGTH_KEY_ID

211
212
214
216

dim rc, nAttributeMTU
rc = NvCfgKeyGet(ATTRIBUTE_MTU_KEY_ID, nAttributeMTU)
IF (nAttributeMTU > 23) THEN
//Disable DLE configuration
rc = NvCfgKeySet(ATTRIBUTE_MTU_KEY_ID, 23)
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rc = NvCfgKeySet(ATTRIBUTE_DATA_LENGTH_KEY_ID, 20)
rc = NvCfgKeySet(ENABLE_HIGH_BANDWIDTH_KEY_ID, 0)
rc = NvCfgKeySet(BLE_MAX_PACKET_LENGTH_KEY_ID, 27)
//Reset module for configuration update to apply
Reset(0)
ENDIF
If the configuration is applied successfully, success codes display (Figure 35).

Figure 35: DLE configuration applied

If there is an error, the following displays (Figure 36). If you receive an error, ensure that you are using the latest firmware.

Figure 36: DLE unsupported in firmware

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8.2 Enabling DLE on the OTA VSP Application
To enable DLE on the OTA VSP application, follow these steps:
1.

Select Settings from the main interface.

Adjust the packet size option from the default of 20 up to a larger value. We recommend a value no larger than 90
(Figure 37).

Figure 37: Increasing packet length to 90

Click Save to save changes and return to the main screen.

8.3 Downloading an application with DLE enabled
Follow the normal instructions in the Performing an OTA Application Download section to download with DLE enabled.

8.4 Disabling DLE on the OTA VSP Application
To disable DLE on the OTA VSP application, follow these steps:
1.

Select Settings from the main interface.

Adjust the packet size option to the default of 20 (Figure 38).

Figure 38: Packet length set back to default

Click Save to save changes and return to the main screen of the application.

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8.5 Performance Analysis
We tested how long it takes to load an application to a BL652 module. We enabled/disabled long characteristic writes as
well as DLE. The results gathered are displayed in the following tables.
▪
▪
▪

Android device testing with a Bluetooth v4.1 radio – Long characteristic write performance comparison with BL652
(28.7.3.0) tested with a Nexus 6 (6.0.1) and packet lengths 20 and 90. TCalculated as Without/With*100 – Table 3
Linux device testing – DLE performance comparison with BL652 (28.7.3.0) tested with a Laird BT851 on Arch Linux and
packet lengths 20 and 90. TCalculated as Without/With*100 – Table 4
Testing on a Linux PC and Laird BT851 Bluetooth v4.2 radio with supports long characteristic writes and DLE – Table

The results show a marked improvement in throughput when larger packet sizes are used.
Table 3: Testing on a Nexus 6 Android device

AT Interface

CMD Manager

SmartZ

BL652 Sample App

117289

81285

50940

28875

374

212

132

456%

400%

388%

357%

AT Interface

CMD Manager

SmartZ

BL652 Sample App

117289

81285

50940

28875

Without DLE (seconds)

214

148

With DLE (seconds)

382%

370%

372%

360%

Transfer size (bytes)
Without DLE (seconds)
With DLE (seconds)
DLE throughput comparison

Table 4: Testing on a Linux device

Transfer size (bytes)

DLE throughput comparisonT

9 KNOWN ISSUES
▪

(12647) BL652 OTA fails with devices using a Bluetooth v5 radio which supports 2M PHY on firmware version 28.7.3.0
–

▪

(12772) BL652 OTA fails with Android devices using a Bluetooth v5 radio with DLE configuration keys enabled on
firmware 28.7.3.0 and 28.7.3.3
–

▪

This is an issue caused by the module not responding to the PHY change event, to resolve the issue please
update the module’s firmware to a newer version than 28.7.3.0.

This is an issue caused by Android expecting a response to a command that the BL652 is not sending, to workaround the issue, restore the DLE config keys of the BL652 back to default and put the packet size in the OTA
VSP application to 20.

(12742) BL654 OTA fails with Android devices using a Bluetooth v5 radio with DLE configuration keys enabled
–

This is an issue caused by Android expecting a response to a command that the BL654 is not sending, to workaround the issue, restore the DLE config keys of the BL654 back to default and put the packet size in the OTA
VSP application to 20.

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10 TESTED DEVICES
10.1 Android
Device

Details

Bluetooth Version

Issues?

Nexus 6

4.1



Nexus 7

4.0



Nexus 9

4.1



Hudl 2

4.0



Pixel 2

5.0



Issue Details

Incompatible with BL652
firmware version 28.7.3.0

10.2 Linux
Device

Details

Bluetooth Version

x86_64 laptop

Using BT851 USB
dongle

4.2

Raspberry Pi 3

4.1

Issues?

Issue Details




10.3 iOS
Device

Details

Bluetooth Version

Issues?

iPod Touch 5g

4.0

iPad X



iPad Mini X



iPhone SE

4.2



iPhone 8

5.0



Details

Bluetooth Version

Issues?

Late 2012 Macbook

4.0



Late 2012 iMac

4.0



Issue Details

Incompatible with BL652
firmware version 28.7.3.0

10.4 Mac
Device

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11 ONLINE XCOMPILER SERVICE PRIVACY
Laird takes security and privacy of customer’s data seriously. When a request is made to the online XCompilation server,
some public information is recorded in a log file which consists of the following:
▪
▪
▪
▪
▪
▪
▪

Time and date of the request
Originating IP address
Type of web request and the URL
Destination TCP port
Browser user-agent string
Size of the submitted request
Result code of the submitted request.

This public information only contains meta-data from the request and does not contain any sensitive private data such as
the source code to be XCompiled. Submitted application source code and output XCompiled application files are stored
temporally on the XCompilation server only for the purpose of XCompilation and are purged from the system once the web
request has finished being transmitted back to the client.
Remember: There is the option of communicating with the XCompilation server using unencrypted HTTP and encrypted
HTTPS using SSL (Secure Sockets Layer) which ensures that data exchanged between the client and XCompilation server
cannot be intercepted and decrypted by third parties. We recommend that you keep the SSL option enabled. If you are in a
country that has outlawed encryption, you can disable SSL support by unchecking the checkbox in settings.
Information in the log files may be used for data analytical purposes to monitor common modules or firmware versions
used on the online XCompilation server – this data only includes anonymised data from the log files where the IP address
and browser user-agent have been stripped and does not include any portion of the submitted application source code.

12 LICENSE INFORMATION
Laird OTA VSP and its source code is released under the GNU GPLv3 (not
including LGPL or newer versions) license as described below. You are free
to make any changes to the code so long as you abide by the license terms
and release your modified code under the same license.
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc.
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
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When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
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To protect your rights, we need to prevent others from denying you
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A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
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doubtful cases shall be resolved in favor of coverage. For a particular
product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product. A product
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"Installation Information" for a User Product means any methods,
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If you convey an object code work under this section in, or with, or
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if neither you nor any third party retains the ability to install
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documented (and with an implementation available to the public in
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unpacking, reading or copying.
7. Additional Terms.
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License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it. (Additional permissions may be written to require their own
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removal in certain cases when you modify the work.) You may place
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Notwithstanding any other provision of this License, for material you
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All other non-permissive additional terms are considered "further
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Additional terms, permissive or non-permissive, may be stated in the
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the above requirements apply either way.
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You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
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this License (including any patent licenses granted under the third
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paragraph of section 11).
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
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holder fails to notify you of the violation by some reasonable means
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your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
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material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
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for enforcing compliance by third parties with this License.
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You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
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sale, or importing the Program or any portion of it.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
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then you must either (1) cause the Corresponding Source to be so
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patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does
the scope of its coverage, prohibits the exercise
conditioned on the non-exercise of one or more of
specifically granted under this License. You may
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not
of,
the
not

include within
or is
rights that are
convey a covered
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work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
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public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
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17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

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This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
Copyright (C)
This program comes with ABSOLUTELY NO WARRANTY; for details type `show
w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
.

ACKNOWLEDGEMENTS

Laird OTA VSP uses the Qt framework version 5, which is licensed under the
GPLv3 (not including later versions).
Laird OTA VSP uses and may be linked statically to various other libraries
including Xau, XCB, expat, fontconfig, zlib, bz2, harfbuzz, freetype, udev,
dbus, icu, unicode, UPX, OpenSSL. The licenses for these libraries are
provided below:

Lib Xau:

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The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.

xcb:
Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett.
All Rights Reserved.
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall
be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the names of the authors
or their institutions shall not be used in advertising or
otherwise to promote the sale, use or other dealings in this
Software without prior written authorization from the
authors.
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expat:
Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
and Clark Cooper
Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Expat maintainers.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

fontconfig:
Copyright © 2001,2003 Keith Packard
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation, and that the name of Keith Packard not be used in
advertising or publicity pertaining to distribution of the software without
specific, written prior permission. Keith Packard makes no
representations about the suitability of this software for any purpose. It
is provided "as is" without express or implied warranty.
KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
z:
(C) 1995-2013 Jean-loup Gailly and Mark Adler

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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly
jloup@gzip.org

Mark Adler
madler@alumni.caltech.edu

bz2:
This program, "bzip2", the associated library "libbzip2", and all
documentation, are copyright (C) 1996-2010 Julian R Seward. All
rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
3. Altered source versions must be plainly marked as such, and must
not be misrepresented as being the original software.
4. The name of the author may not be used to endorse or promote
products derived from this software without specific prior written
permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Julian Seward, jseward@bzip.org
bzip2/libbzip2 version 1.0.6 of 6 September 2010

harfbuzz:
HarfBuzz is licensed under the so-called "Old MIT" license.
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright
Copyright

Details follow.

2010,2011,2012 Google, Inc.
2012 Mozilla Foundation
2011 Codethink Limited
2008,2010 Nokia Corporation and/or its subsidiary(-ies)
2009 Keith Stribley
2009 Martin Hosken and SIL International
2007 Chris Wilson
2006 Behdad Esfahbod
2005 David Turner
2004,2007,2008,2009,2010 Red Hat, Inc.
1998-2004 David Turner and Werner Lemberg

For full copyright notices consult the individual files in the package.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the
above copyright notice and the following two paragraphs appear in
all copies of this software.
IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

freetype:
The FreeType 2 font engine is copyrighted work and cannot be used
legally without a software license.
In order to make this project
usable to a vast majority of developers, we distribute it under two
mutually exclusive open-source licenses.
This means that *you* must choose *one* of the two licenses described
below, then obey all its terms and conditions when using FreeType 2 in
any of your projects or products.

Embedded Wireless Solutions Support Center:
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- The FreeType License, found in the file `FTL.TXT', which is similar
to the original BSD license *with* an advertising clause that forces
you to explicitly cite the FreeType project in your product's
documentation. All details are in the license file. This license
is suited to products which don't use the GNU General Public
License.
Note that this license is compatible
License version 3, but not version 2.

to the

GNU General

Public

- The GNU General Public License version 2, found in `GPLv2.TXT' (any
later version can be used also), for programs which already use the
GPL. Note that the FTL is incompatible with GPLv2 due to its
advertisement clause.
The contributed BDF and PCF drivers come with a license similar to that
of the X Window System. It is compatible to the above two licenses (see
file src/bdf/README and src/pcf/README).
The gzip module uses the zlib license (see src/gzip/zlib.h) which too is
compatible to the above two licenses.
The MD5 checksum support (only used for debugging in development builds)
is in the public domain.

udev:
Copyright (C) 2003 Greg Kroah-Hartman
Copyright (C) 2003-2010 Kay Sievers
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .

dbus:
D-Bus is licensed to you under your choice of the Academic Free
License version 2.1, or the GNU General Public License version 2
(or, at your option any later version).

icu:
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ICU License - ICU 1.8.1 and later
COPYRIGHT AND PERMISSION NOTICE
Copyright (c) 1995-2015 International Business Machines Corporation and
others
All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to
do so, provided that the above copyright notice(s) and this permission
notice appear in all copies of the Software and that both the above
copyright notice(s) and this permission notice appear in supporting
documentation.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE
LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Except as contained in this notice, the name of a copyright holder shall not
be used in advertising or otherwise to promote the sale, use or other
dealings in this Software without prior written authorization of the
copyright holder.

Unicode:
COPYRIGHT AND PERMISSION NOTICE
Copyright © 1991-2015 Unicode, Inc. All rights reserved.
Distributed under the Terms of Use in
http://www.unicode.org/copyright.html.
Permission is hereby granted, free of charge, to any person obtaining
a copy of the Unicode data files and any associated documentation
(the "Data Files") or Unicode software and any associated documentation
(the "Software") to deal in the Data Files or Software
without restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, and/or sell copies of
the Data Files or Software, and to permit persons to whom the Data Files
or Software are furnished to do so, provided that
(a) this copyright and permission notice appear with all copies
of the Data Files or Software,
(b) this copyright and permission notice appear in associated
documentation, and
(c) there is clear notice in each modified Data File or in the Software
as well as in the documentation associated with the Data File(s) or
Software that the data or software has been modified.
THE DATA FILES AND SOFTWARE ARE PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT OF THIRD PARTY RIGHTS.
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS
NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL
DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THE DATA FILES OR SOFTWARE.
Except as contained in this notice, the name of a copyright holder
shall not be used in advertising or otherwise to promote the sale,
use or other dealings in these Data Files or Software without prior
written authorization of the copyright holder.

UPX:
Copyright (C) 1996-2013 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2013 László Molnár
Copyright (C) 2000-2013 John F. Reiser
All Rights Reserved. This program may be used freely, and you are welcome to
redistribute and/or modify it under certain conditions.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the UPX License Agreement for more
details: http://upx.sourceforge.net/upx-license.html

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
'This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit. (http://www.openssl.org/)'
4. The names 'OpenSSL Toolkit' and 'OpenSSL Project' must not be used to
endorse or promote products derived from this software without
prior written permission. For written permission, please contact
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openssl-core@openssl.org.
5. Products derived from this software may not be called 'OpenSSL'
nor may 'OpenSSL' appear in their names without prior written
permission of the OpenSSL Project.
6. Redistributions of any form whatsoever must retain the following
acknowledgment:
'This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/)'
THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR").append(" CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
====================================================================
This product includes cryptographic software written by Eric Young
(eay@cryptsoft.com). This product includes software written by Tim
Hudson (tjh@cryptsoft.com).
Original SSLeay License
----------------------Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
All rights reserved.
This package is an SSL implementation written
by Eric Young (eay@cryptsoft.com).
The implementation was written so as to conform with Netscapes SSL.
This library is free for commercial and non-commercial use as long as
the following conditions are aheared to. The following conditions
apply to all code found in this distribution, be it the RC4, RSA,
lhash, DES, etc., code; not just the SSL code. The SSL documentation
included with this distribution is covered by the same copyright terms
except that the holder is Tim Hudson (tjh@cryptsoft.com).
Copyright remains Eric Young's, and as such any Copyright notices in
the code are not to be removed.
If this package is used in a product, Eric Young should be given attribution
as the author of the parts of the library used.
This can be in the form of a textual message at program startup or
in documentation (online or textual) provided with the package.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
Embedded Wireless Solutions Support Center:
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Laird OTV VSP Application
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are met:
1. Redistributions of source code must retain the copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
'This product includes cryptographic software written by
Eric Young (eay@cryptsoft.com)'
The word 'cryptographic' can be left out if the rouines from the library
being used are not cryptographic related :-).
4. If you include any Windows specific code (or a derivative thereof) from
the apps directory (application code) you must include an
acknowledgement:
'This product includes software written by Tim Hudson
(tjh@cryptsoft.com)'
THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
The licence and distribution terms for any publically available version or
derivative of this code cannot be changed. i.e. this code cannot simply be
copied and put under another distribution licence
[including the GNU Public Licence.]");

14 ADDITIONAL DOCUMENTATION
Laird offers a variety of documentation and ancillary information to support our customers through, additional
documentation can be accessed from the Documentation tab of all product pages which can be found on the Laird
Bluetooth Modules Product Page.
For any additional questions or queries, or to receive technical support for this VSP application, please contact Embedded
Wireless Solutions Support: http://ews-support.lairdtech.com

Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth

Europe: +44-1628-858-940
Hong Kong: +852 2923 0610

Laird OTV VSP Application
User Guide

© Copyright 2018 Laird. All Rights Reserved. Patent pending. Any information furnished by Laird and its agents is believed to be accurate and reliable. All
specifications are subject to change without notice. Responsibility for the use and application of Laird materials or products rests with the end user since
Laird and its agents cannot be aware of all potential uses. Laird makes no warranties as to non-infringement nor as to the fitness, merchantability, or
sustainability of any Laird materials or products for any specific or general uses. Laird, Laird Technologies, Inc., or any of its affiliates or agents shall not be
liable for incidental or consequential damages of any kind. All Laird products are sold pursuant to the Laird Terms and Conditions of Sale in effect from
time to time, a copy of which will be furnished upon request. When used as a tradename herein, Laird means Laird PLC or one or more subsidiaries of Laird
PLC. Laird™, Laird Technologies™, corresponding logos, and other marks are trademarks or registered trademarks of Laird. Other marks may be the
property of third parties. Nothing herein provides a license under any Laird or any third party intellectual property right.

Embedded Wireless Solutions Support Center:
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www.lairdtech.com/bluetooth

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Hong Kong: +852 2923 0610

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