Texas Instruments 2540EM The CC2540EM is a development tool for TIs 2.4 GHz CC2540 Bluetooth low energy system-on-chip User Manual EVALUATION BOARD KIT MODULE EVM ADDITIONAL TERMS
Texas Instruments Inc. The CC2540EM is a development tool for TIs 2.4 GHz CC2540 Bluetooth low energy system-on-chip EVALUATION BOARD KIT MODULE EVM ADDITIONAL TERMS
Users Manual
December 2013
Web sites: www.ti.com/ble
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CC2540 Evaluation Module Kit Quick Start Guide
Opening the Box and Running the Bluetooth® Low Energy SimpleBLE Demo Application
1. Kit Contents
2 x CC2540 Evaluation Modules
2 x Pulse W1010 Antennas
Documentation
The kit is FCC and IC certified and tested/complies with
ETSI/R&TTE over temperature from 0 to +35°C. The
antenna, W1010 from Pulse, is a ¼ wave dipole antenna with
2 dBi gain.
FCC/IC Regulatory Compliance
FCC Part 15 Class A Compliant
IC ICES-003 Class A Compliant
2. Hardware Requirements
The CC2540EMK is an add-on kit to the
CC2540DK. To run the example described in this
Quick Start Guide, you would need two
SmartRF05 Boards (Rev 1.8.1 or later). These
boards are included in the CC2540DK (and not in
the CC2540EMK).
More information about the SmartRF05EB can
be found in www.ti.com/lit/swru210.
The CC2540EM boards can also be plugged into
a battery board (see www.ti.com/tool/soc-bb) for
standalone operation.
3. Hardware Setup
Connect the antenna to the SMA connector on
the CC2540 evaluation module (CC2540EM).
Tighten the antenna’s screw firmly on to the SMA
connector. If not properly connected, you might
see reduced RF performance.
Next, mount the CC2540EMs
firmly on to connectors P5
and P6 on the
SmartRF05EB.
4. Power Options
There are several ways of applying power to the
SmartRF05EB;
USB (5V through USB plug)
External Power Supply (see below)
2 x 1.5V AA Non-Rechargeable Alkaline
Batteries
Voltage regulators on the SmartRF05EB will set
the on-board voltage to 3.3V.
External Power Supply1 Requirements:
Nom Voltage: 4 to 20 VDC
Max Current: 1500 mA
Efficiency Level V
Warning! To minimize risk of personal injury or
property damage, never use rechargeable batteries to
power the board.
5. Power the Boards
Locate the power source
header P11 just above
the LCD on the
SmartRF05EB. Connect
pins 1 and 2 if you are
using batteries to power the board. Connect pins
2 and 3 if you are using USB or external power
supply.
Once you have set P11,
find switch P8 just next to
the DC jack on the
SmartRF05EB. To power
on the board, flip the
switch from “OFF” to “ON”.
6. Start-up Screen
One of the CC2540EMs will be pre-loaded with
the SimpleBLECentral application, while the
other will be pre-loaded with the
SimpleBLEPeripheral application. The LCD
screens on the two SmartRF05EBs should
display messages similar to those below:
The “0x…” value displayed on each board is the
device address. Every CC2540 device has a
unique address.
7. Using the Joystick
The SimpleBLEPeripheral application runs
autonomously and does not require any user
interaction. The SimpleBLECentral application,
however, requires user interaction by means of
joystick U1. Find joystick U1 on the top side of
the SmartRF05EB, immediately below the LCD.
The joystick has five different movements: it can
be moved up, down, left, right, and it can be
pressed in, just like a button. Each movement
performs different actions depending on the state
of the device.
8. Device Discovery
Before the two devices
can connect, the central
device must first
discover the peripheral
device. To perform
device discovery, press
up on joystick U1 once.
The LCD on the central
device should display
“Discovering…”.
After a few seconds, it should display “Devices
Found 1 / <- To Select”. This means that the
central device successfully discovered the
peripheral. Press left on joystick U1 to view the
address of the peripheral device. This address
should match the address seen on the
peripheral’s LCD.
9. Establish Connection
To establish a
connection with
the peripheral,
press joystick U1
in towards the
board (push it in
like it is a button).
Once the
connection is
established, the central device will automatically
perform service discovery on the peripheral using
the BLE GATT protocol. This should complete
within a few seconds.
The two LCD screens should appear as in the
images below, with the central still displaying the
peripheral’s address and the peripheral having
changed from “Advertising” to “Connected”:
Be careful that you don’t double tap U1 which
would terminate the connection immediately,
giving Disconnected Reason: 22.
1
When using an external power supply, make sure it meets the listed requirements in addition to complying with applicable regional product regulatory and
safety certification requirements such as UL, CSA, VDE, CCC, and PSE.
10. Connected Operations
Once the connection has been established and
service discovery is complete, you can perform
the following operations using joystick U1 on the
central device:
Read / Write Data – U1 UP
RSSI Monitoring – U1 DOWN
Connection Parameter Update – U1 RIGHT
Terminate Link – U1 IN (towards the board)
11. Read / Write Data
Pressing up on U1 will send a read request to the
peripheral device. One byte of data will be read,
and the value will be displayed. Pressing up
again will send a write request, and one byte of
data will be written to the peripheral. The
peripheral’s LCD should display the written value
each time this is done.
Bluetooth low energy is an ideal technology for
transmission of small amounts of data between
two devices while consuming very little power, as
is demonstrated here.
Continuing to press up on the joystick will
alternate between reads and writes, with the
value incrementing each time.
12. Monitor RSSI
Pressing down on U1 will turn on RSSI (received
signal strength indication) monitoring. The RSSI
will be displayed on the LCD in units of negative
dBm.
If the boards are moved farther apart from each
other, the RSSI will drop (since the value is
negative, a higher number means lower RSSI). If
they are moved closer together, the RSSI should
rise.
Pressing down on U1 again will turn off RSSI
monitoring.
13. Connection Parameter
Update
Pressing right on U1 will send a connection
parameter update request to the peripheral to
use a longer connection interval. This will result
in much longer latency when performing data
reads and writes; however the power consumed
by both devices is significantly reduced.
14. Terminate Link
Pressing U1 in towards the board will terminate
the link. The peripheral will return to an
advertising state. The central device will display
a “Reason” code, which indicates why the
disconnection occurred (values are defined in the
BLE stack API).
In this case, the reason code of 22 indicates that
the link termination was initiated by the central
device. In the event that the peripheral device
goes out of range or has power disconnected
from it, you will see a reason code of 8 which
indicates that a link timeout has occurred.
You can now perform device discovery and re-
connect to the peripheral if desired.
15. SimpleBLE Demo Source
Code
The project and source code files for these
applications (as well as many others) are
included with the Bluetooth low energy (BLE)
stack from Texas Instruments, which can be
downloaded at www.ti.com/blestack.
The two projects implementing this demo are
called SimpleBLECentral (CC2540EM Master
configuration) and SimpleBLEPeripheral
(CC2540 Slave configuration). These can be
modified as desired, and should provide a good
framework for developing your own custom BLE
applications.
More details on these projects can be found
within the BLE Software Developer’s Guide,
which is included with the stack.
Additional Tools and Links
BLE Packet Sniffer
A CC2540 USB Dongle (not included) can be
used as a BLE sniffer and monitor packets while
the SimpleBLE Demo is running.
The SmartRF Protocol Packet Sniffer application
can be downloaded from
www.ti.com/tool/packet-sniffer.
SmartRF™ Studio
SmartRF Studio allows you to configure the radio,
run RF performance tests, and run link tests
between the two SmartRF05EBs.
SmartRF Studio can be downloaded from
www.ti.com/smartrfstudio
SmartRF Flash Programmer
Texas Instruments has a simple tool which can
be used to program and flash the CC2540.
The SmartRF Flash Programmer application
can be downloaded from
www.ti.com/tool/flash-programmer
BTool
BTool is a Windows application that allows you to
control a central device using the serial interface
and perform various BLE functions while
connected to a peripheral device.
BTool is included as part of the installation of the
BLE stack (see “Useful Links” to the right).
IAR Embedded Workbench
To develop software, program, and debug the
CC2540, you should use IAR Embedded
Workbench for 8051.
More information on IAR EW8051, including a
free evaluation version download, can be found at
www.iar.com/ew8051.
Useful Links
TI BLE Stack and Software:
www.ti.com/ble-stack
CC2540/ Development Kit User Guide:
www.ti.com/lit/swru301
CC2540 BLE Software Developer’s Guide:
www.ti.com/lit/swru271
CC2540/41 User’s Guide:
www.ti.com/lit/swru191
CC2540 Product Page:
www.ti.com/cc2540
For additional help, visit the TI E2E Forums:
www.ti.com/lprf-forum
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS
Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods.
Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO
BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH
ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES.
Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety
programs, please visit www.ti.com/esh or contact TI.
No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and
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software performance, or infringement of patents or services described herein.
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For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT,
DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer
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interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will
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User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and
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Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the
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This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial
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instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to
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This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
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EVALUATION BOARD/KIT/MODULE (EVM)
WARNINGS, RESTRICTIONS AND DISCLAIMERS
For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished
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