High Flying Electronics Technology HF-LPT220 HF-LPT220 User Manual GPON SFU System Design

High-Flying Electronics Technology Co., Ltd. HF-LPT220 GPON SFU System Design

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Date Submitted2016-06-14 00:00:00
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Document Author: Kevin Qiu

HF-LPT220 Low Power WiFi Module User Manual
HF-LPT220
Low Power WiFi Module User Manual
V 1.2
Overview of Characteristic

Support IEEE802.11b/g/n Wireless Standards

Based on Self-developed High Cost Effective SOC

Support UART/GPIO Data Communication Interface

Support Work As STA/AP Mode

Support Smart Link Function (APP program provide)

Support Wireless and Remote Firmware Upgrade Function

Support WPS Function(Reserved)

Support Internal/External Pin Antenna Option

Single +3.3V Power Supply

Smallest Size: 22mm x 13.5mm x 3.8mm , SMT17 Package

FCC/CE Certificated
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HF-LPT220 Low Power WiFi Module User Manual
FCC STATEMENT :
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause
undesired operation.
Warning: Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
NOTE: 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 generates
uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and receiver.
 Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
 Consult the dealer or an experienced radio/TV technician for help.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance 20cm
between the radiator & your body.
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HF-LPT220 Low Power WiFi Module User Manual
FCC INFORMATION (additional)
OEM INTEGRATION INSTRUCTIONS:
This device is intended only for OEM integrators under the following conditions: The module must
be installed in the host equipment such that 20 cm is maintained between the antenna and users,
and the transmitter module may not be co-located with any other transmitter or antenna. The
module shall be only used with the internal antenna(s) that has been originally tested and
certified with this module. As long as 3 conditions above are met, further transmitter test will not
be required. However, the OEM integrator is still responsible for testing their end-product for any
additional compliance requirements required with this module installed (for example, digital
device emissions, PC peripheral requirements, etc.).
Validity of using the module certification:
In the event that these conditions cannot be met (for example certain laptop configurations or colocation with another transmitter), then the FCC authorization for this module in combination with
the host equipment is no longer considered valid and the FCC ID of the module cannot be used
on the final product. In these circumstances, the OEM integrator will be responsible for reevaluating the end product (including the transmitter) and obtaining a separate FCC authorization.
End product labeling:
This transmitter module is authorized only for use in device where the antenna may be installed
such that 20 cm may be maintained between the antenna and users. The final end product
must be labeled in a visible area with the following: “Contains FCC ID: 2ACSV-HF-LPT220”.
Information that must be placed in the end user manual:
The OEM integrator has to be aware not to provide information to the end user regarding how to
install or remove this RF module in the user's manual of the end product which integrates this
module. The end user manual shall include all required regulatory information/warning as show in
this manual.
This device must be kept away from all persons by 20cm or more and installations using less
distance, or installations using antennas with gain greater than that with which this was Certified will
require additional approvals.
Antenna Specification:
Type: SMD Antenna
Model: HF-LPT220
Brand: High-Flying
Gain: 0.8 dBi
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HF-LPT220 Low Power WiFi Module User Manual
TABLE OF CONTENTS
LIST OF FIGURES ............................................................................................................................. 8
LIST OF TABLES ............................................................................................................................... 9
HISTORY.......................................................................................................................................... 10
1.
PRODUCT OVERVIEW.......................................................................................................... 11
1.1.
General Description .......................................................................................................... 11
1.1.1
1.1.2
Device Paremeters....................................................................................................... 12
1.1.3
Key Application ............................................................................................................ 12
1.2.
2.
Hardware Introduction ...................................................................................................... 13
1.2.1.
Pins Definition .............................................................................................................. 13
1.2.2.
Electrical Characteristics .............................................................................................. 14
1.2.3.
Mechanical Size ........................................................................................................... 15
1.2.4.
On-board Chip Antenna ............................................................................................... 15
1.2.5.
External Antenna ......................................................................................................... 16
1.2.6.
Evaluation Kit ............................................................................................................... 16
1.2.7.
Order Information ......................................................................................................... 18
1.2.8.
Hardware Typical Application ....................................................................................... 18
FUNCTIONAL DESCRIPTI ON .............................................................................................. 20
2.1.
3.
Device Features ........................................................................................................... 11
Wireless Networking ......................................................................................................... 20
2.1.1.
Basic Wireless Network Based On AP (Infrastructure) .................................................. 20
2.1.2.
Wireless Network Based On AP+STA .......................................................................... 20
2.2.
Work Mode : Transparent Transmission Mode ................................................................ 21
2.3.
UART Frame Scheme(Reserved) ...................................................................................... 21
2.3.1.
UART Free-Frame ....................................................................................................... 21
2.3.2.
UART Auto-Frame ....................................................................................................... 22
2.4.
Encryption ......................................................................................................................... 22
2.5.
Parameters Configuration ................................................................................................ 22
2.6.
Firmware Update（Reserved, See Appendix C） ............................................................ 22
2.7.
SOCKET B Function.......................................................................................................... 23
2.8.
Multi-TCP Link Connection(Reserved) ............................................................................. 24
OPERATION GUIDELINE ...................................................................................................... 25
3.1.
Configuration .................................................................................................................... 25
3.2.
Usage Introduction ........................................................................................................... 25
3.2.1.
Software Debug Tools .................................................................................................. 25
3.2.2.
Network Connection ..................................................................................................... 25
3.2.3.
Default Parameter Setting ............................................................................................ 26
3.2.4.
Module Debug ............................................................................................................. 26
3.3.
Typical Application Examples .......................................................................................... 27
3.3.1.
Wireless Control Application ......................................................................................... 27
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HF-LPT220 Low Power WiFi Module User Manual
4.
3.3.2.
Remote Management Application ................................................................................. 28
3.3.3.
Transparent Serial Port Application .............................................................................. 28
AT+INSTRUCTION INTRODUCTION ................................................................................... 29
4.1.
Configuration Mode .......................................................................................................... 29
4.1.1.
4.2.
Switch to Configuration Mode ....................................................................................... 29
AT+Instruction Set Overview ............................................................................................ 30
4.2.1.
Instruction Syntax Format............................................................................................. 30
4.2.2.
AT+Instruction Set ....................................................................................................... 31
4.2.2.1.
AT+E ........................................................................................................................ 33
4.2.2.2.
AT+WMODE............................................................................................................. 34
4.2.2.3.
AT+ENTM ................................................................................................................ 34
4.2.2.4.
AT+TMODE .............................................................................................................. 34
4.2.2.5.
AT+MID .................................................................................................................... 34
4.2.2.6.
AT+VER ................................................................................................................... 35
4.2.2.7.
AT+LVER ................................................................................................................. 35
4.2.2.8.
AT+FWSZ ................................................................................................................ 35
4.2.2.9.
AT+RELD ................................................................................................................. 35
4.2.2.10.
AT+FCLR .............................................................................................................. 35
4.2.2.11.
AT+Z..................................................................................................................... 36
4.2.2.12.
AT+H .................................................................................................................... 36
4.2.2.13.
AT+CFGTF ........................................................................................................... 36
4.2.2.14.
AT+UART ............................................................................................................. 36
4.2.2.15.
AT+UARTF ........................................................................................................... 37
4.2.2.16.
AT+UARTFT ......................................................................................................... 37
4.2.2.17.
AT+UARTFL ......................................................................................................... 37
4.2.2.18.
AT+UARTTE ......................................................................................................... 38
4.2.2.19.
AT+SEND ............................................................................................................. 38
4.2.2.20.
AT+RECV ............................................................................................................. 38
4.2.2.21.
AT+PING .............................................................................................................. 38
4.2.2.22.
AT+NETP ............................................................................................................. 39
4.2.2.23.
AT+MAXSK........................................................................................................... 39
4.2.2.24.
AT+TCPLK............................................................................................................ 40
4.2.2.25.
AT+TCPTO ........................................................................................................... 40
4.2.2.26.
AT+TCPDIS .......................................................................................................... 40
4.2.2.27.
AT+SOCKB........................................................................................................... 41
4.2.2.28.
AT+TCPDISB........................................................................................................ 41
4.2.2.29.
AT+TCPTOB ......................................................................................................... 41
4.2.2.30.
AT+TCPLKB ......................................................................................................... 42
4.2.2.31.
AT+SNDB ............................................................................................................. 42
4.2.2.32.
AT+RCVB ............................................................................................................. 42
4.2.2.33.
AT+WSSSID ......................................................................................................... 43
4.2.2.34.
AT+WSKEY .......................................................................................................... 43
4.2.2.35.
AT+WANN ............................................................................................................ 43
4.2.2.36.
AT+WSMAC ......................................................................................................... 44
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HF-LPT220 Low Power WiFi Module User Manual
5.
4.2.2.37.
AT+WSLK ............................................................................................................. 44
4.2.2.38.
AT+WSLQ............................................................................................................. 44
4.2.2.39.
AT+WSCAN .......................................................................................................... 45
4.2.2.40.
AT+WSDNS .......................................................................................................... 45
4.2.2.41.
AT+LANN ............................................................................................................. 45
4.2.2.42.
AT+WAP ............................................................................................................... 45
4.2.2.43.
AT+WAKEY .......................................................................................................... 46
4.2.2.44.
AT+WAMAC ......................................................................................................... 46
4.2.2.45.
AT+WADHCP ....................................................................................................... 46
4.2.2.46.
AT+WADMN ......................................................................................................... 47
4.2.2.47.
AT+WALK ............................................................................................................. 47
4.2.2.48.
AT+WALKIND ....................................................................................................... 47
4.2.2.49.
AT+WAPMXSTA ................................................................................................... 48
4.2.2.50.
AT+OTA................................................................................................................ 48
4.2.2.51.
AT+UPURL ........................................................................................................... 48
4.2.2.52.
AT+UPFILE........................................................................................................... 48
4.2.2.53.
AT+LOGSW .......................................................................................................... 49
4.2.2.54.
AT+LOGPORT ...................................................................................................... 49
4.2.2.55.
AT+UPST ............................................................................................................. 49
4.2.2.56.
AT+DISPS ............................................................................................................ 50
4.2.2.57.
AT+NTPRF ........................................................................................................... 50
4.2.2.58.
AT+NTPEN ........................................................................................................... 50
4.2.2.59.
AT+NTPTM ........................................................................................................... 51
4.2.2.60.
AT+NTPSER......................................................................................................... 51
4.2.2.61.
AT+WRMID........................................................................................................... 51
4.2.2.62.
AT+RLDEN ........................................................................................................... 51
4.2.2.63.
AT+ASWD ............................................................................................................ 52
4.2.2.64.
AT+MDCH ............................................................................................................ 52
4.2.2.65.
AT+TXPWR .......................................................................................................... 52
4.2.2.66.
AT+SMTLK ........................................................................................................... 53
4.2.2.67.
AT+SMTLKVER .................................................................................................... 53
4.2.2.68.
AT+WPS ............................................................................................................... 53
4.2.2.69.
AT+WPSBTNEN ................................................................................................... 54
4.2.2.70.
AT+LPTIO ............................................................................................................. 54
4.2.2.71.
AT+WIFI ............................................................................................................... 54
4.2.2.72.
AT+SMEM ............................................................................................................ 55
4.2.2.73.
AT+NDBGL ........................................................................................................... 55
PACKAGE INFORMATION ................................................................................................... 56
5.1.
Recommended Reflow Profile .......................................................................................... 56
5.2.
Device Handling Instruction (Module IC SMT Preparation) ............................................. 56
5.3.
Shipping Information ........................................................................................................ 57
APPENDIX A: HW REFERENCE DESIGN .................................................................................. 58
APPENDIX B: HTTP PROTOCOL TRANSFER .......................................................................... 59
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HF-LPT220 Low Power WiFi Module User Manual
B.1. HTTP AT command(Reserved)............................................................................................ 59
B.1.1.
AT+HTTPURL.............................................................................................................. 59
B.1.2.
AT+HTTPTP ................................................................................................................ 59
B.1.3.
AT+HTTPPH ................................................................................................................ 59
B.1.4.
AT+HTTPCN................................................................................................................ 60
B.1.5.
AT+HTTPUA ................................................................................................................ 60
B.1.6.
AT+HTTPDT ................................................................................................................ 60
B.2. HTTP Example ..................................................................................................................... 60
C.3. Sending HTTP Raw Data in Throughput Mode(Recommend) ............................................ 61
C.4. Sending HTTP Request By AT Command(Reserved) ........................................................ 62
APPENDIX D:REFERENCES ....................................................................................................... 64
D.1．High-Flying Mass Production Tool.................................................................................... 64
D.2．SmartLink APP V7 Config Tool.......................................................................................... 64
D.3．EVK Quick Start Guide....................................................................................................... 64
C.4．Module Upgrade ................................................................................................................. 64
D.4．SDK Download ................................................................................................................... 64
APPENDIX E: CONTACT INFORMATION .................................................................................. 65
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HF-LPT220 Low Power WiFi Module User Manual
LIST OF FIGURES
HF-LPT220 Pins Map........................................................................................................................ 13
Figure 1.
HF-LPT220 Mechanical Dimension .................................................................................. 15
Figure 2.
HF-LPT220 PCB Symbol Size ......................................................................................... 15
Figure 3.
Suggested Module Placement Region ............................................................................. 16
Figure 4.
HF-LPT220 Evaluation Kit ............................................................................................... 17
Figure 5.
HF-LPT220 Order InformationTypical Application............................................................. 18
Figure 6.
HF-LPT220 Hardware Typical Application ........................................................................ 18
Figure 7.
HF-LPT220 Basic Wireless Network Structure ................................................................. 20
Figure 8.
HF-LPT220 STA Network Structure ................................................................................. 20
Figure 9.
Socket B function demo ................................................................................................... 24
Figure 10.
Multi-TCP Link Data Transmition Structure ................................................................... 24
Figure 11.
STA Interface Debug Connection ................................................................................. 25
Figure 12.
AP Interface Debug Connection ................................................................................... 26
Figure 13.
“CommTools” Serial Debug Tools................................................................................. 26
Figure 14.
“TCPUDPDbg” Tools Create Connection ...................................................................... 26
Figure 15.
“TCPUDPDbg” Tools Setting ........................................................................................ 27
Figure 16.
“TCPUDPDbg” Tools Connection ................................................................................. 27
Figure 17.
Wireless Control Application ......................................................................................... 27
Figure 18.
Remote Management Application ................................................................................. 28
Figure 19.
Transparent Serial Port Application .............................................................................. 28
Figure 20.
HF-LPT220 Default UART Port Parameters.................................................................. 29
Figure 21.
Switch to Configuration Mode ....................................................................................... 29
Figure 22.
”AT+H” Instruction for Help ........................................................................................... 30
Figure 23.
Reflow Soldering Profile ............................................................................................... 56
Figure 24.
Shipping Information .................................................................................................... 57
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HF-LPT220 Low Power WiFi Module User Manual
LIST OF TABLES
Table 1
HF-LPT220 Module Technical Specifications .................................................................... 12
Table 2
HF-LPT220 Pins Definition ............................................................................................... 13
Table 3
HF-LPT220 External Antenna Parameters ........................................................................ 16
Table 4
HF-LPT220 Evaluation Kit Interface Description................................................................ 17
Table 8
HF-LPT220 Web Access Default Setting........................................................................... 25
Table 9
Error Code Describtion ..................................................................................................... 31
Table 10
AT+Instruction Set List.................................................................................................... 31
Table 11 Reflow Soldering Parameter ............................................................................................. 56
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HF-LPT220 Low Power WiFi Module User Manual
HISTORY
Ed. V1.0 01-05-2016
First Version.
Ed. V1.1 01-29-2015
Update AT command supported by 2.0.03 version firmware. Add support for
AT+E、AT+SOCKB、AT+TCPDISB、AT+TCPTOB、AT+TCPLKB、AT+WALK、AT+WALKIND
command. Correct the AT+NETP command description.
Ed. V1.2 03-14-2015
Update AT command supported by 2.0.04 version firmware. Add
support for AT+MAXSK、AT+WAPMXSTA command. Update AT+NETP、AT+UART command. All
the reserved function is not supported yet. See appendix C to get new firmware.
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HF-LPT220 Low Power WiFi Module User Manual
1. PRODUCT OVERVIEW
1.1. General Description
The HF-LPT220 is a fully self-contained small form-factor, single stream, 802.11b/g/n Wi-Fi module,
which provide a wireless interface to any equipment with a Serial interface for data transfer.HFLPT220 integrate MAC, baseband processor, RF transceiver with power amplifier in hardware and all
Wi-Fi protocol and configuration functionality and networking stack, in embedded firmware to make a
fully self-contained 802.11b/g/n Wi-Fi solution for a variety of applications.
The HF-LPT220 employs the world's lowest power consumption embedded architecture. It has been
optimized for all kinds of client applications in the home automation, smart grid, handheld device,
personal medical application and industrial control that have lower data rates, and transmit or receive
data on an infrequent basis.
The HF-LPT220 integrates all Wi-Fi functionality into a low-profile, 22x13.5x 3.8mm SMT module
package that can be easily mounted on main PCB with application specific circuits. Also, module
provides built-in antenna, external pad antenna option.
1.1.1 Device Features

Single stream Wi-Fi @ 2.4 GHz with support for WEP security mode as well as WPA/WPA2

Based on Self-developed High Cost Performance SOC

Includes all the protocol and configuration functions for Wi-Fi connectivity.

Support STA/AP Mode

Support Smart Link Function

Support Wireless and Remote Firmware Upgrade Function

Integrated chip antenna, antenna connector options.

Compact surface mount module 22mm x 13.5mm x 3.8mm, SMT17 Package

Single supply – 3.3V operation.

CE/FCC Certified.

RoHS compliant.
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HF-LPT220 Low Power WiFi Module User Manual
1.1.2 Device Paremeters
Table 1
Class
Wireless
Parameters
HF-LPT220 Module Technical Specifications
Item
Parameters
Certification
Wireless standard
Frequency range
FCC/CE
802.11 b/g/n
2.412GHz-2.462GHz
802.11b: +16 +/-2dBm (@11Mbps)
802.11g: +14 +/-2dBm (@54Mbps)
802.11n: +13 +/-2dBm (@HT20, MCS7)
802.11b: -93 dBm (@11Mbps ,CCK)
802.11g: -85 dBm (@54Mbps, OFDM)
802.11n: -82 dBm (@HT20, MCS7)
External: Pad interface
Internal:On-board Chip antenna
UART
GPIO
2.95~3.6V
Average. ~30mA, Peak: 280mA
-20℃- 85℃
-40℃- 125℃
22mm×13.5mm×3.8mm
STA /AP
WEP/WPA-PSK/WPA2-PSK
WEP64/WEP128/TKIP/AES
Local Wireless, Remote
Support SDK for application develop
IPv4, TCP/UDP/HTTP
AT+instruction set. Android/ iOS
Smart Link APP tools
Transmit Power
Receiver Sensitivity
Antenna Option
Data Interface
Hardware
Parameters
Software
Parameters
Operating Voltage
Operating Current
Operating Temp.
Storage Temp.
Dimensions and Size
Network Type
Security Mechanisms
Encryption
Update Firmware
Customization
Network Protocol
User Configuration
1.1.3 Key Application

Remote equipment monitoring

Asset tracking and telemetry

Security

Industrial sensors and controls

Home automation

Medical devices
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HF-LPT220 Low Power WiFi Module User Manual
1.2. Hardware Introduction
1.2.1.
Pins Definition
HF-LPT220 Pins Map
Table 2
Pin
Describtion
HF-LPT220 Pins Definition
Net Name
N.C
Signal Type
Comments
No connect
N.C
No connect
N.C
No connect
PWM/GPIO
GPIO_8
I/O,PU
GPIO_8
UART0
UART0_TX
O,PU
GPIO_20
UART0
UART0_RX
GPIO_19
UART0
UART0_CTS
I/O
UART0
UART0_RTS
I/O
GPIO
GPIO_1
I/O,PU
GPIO6/UART1_RXD
UART1 Debug Information Input
GPIO5/UART1_TXD
UART1 Debug Information Output
GPIO1
10
Module Reset
EXT_RESETn
I,PU
“Low” effective reset input.
11 Module Boot Up Indicator
nReady
12
Multi-Function
nReload
I,PU
13
Wi-Fi Status
nLink
14
GPIO18
GPIO18
I/O
“0” – Boot-up OK;
“1” – Boot-up No OK;
GPIO_3
Detailed functions see 
GPIO_2
“0” – Wi-Fi connect to router
“1” – Wi-Fi unconncted;
Detailed functions see 
GPIO_15
GPIO_18
15
+3.3V Power
DVDD
Power
16
Ground
GND
Power
17
2.4GHz Antenna PAD
Ant_2.4G
50ohm Impendence
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HF-LPT220 Low Power WiFi Module User Manual

When bootup, module PIN4/5/9 must be high.
I — Input；O — Output
PU—Internal 4.7K Resistor Pull Up；PD—Internal Pull Down； I/O: Digital I/O； Power—
Power Supply
nReload Pin (Button) function：
1.
When this pin is set to “low” during module boot up, the module will enter wireless
firmware and config upgrade mode. This mode is used for customer manufacture.
(See Appendix C to download software tools for customer batch configuration and
upgrade firmware during mass production)
2.
After module is powered up, short press this button ( “Low” < 2s ) to make the
module go into “Smart Link “ config mode, waiting for APP to set password and
other information. (See Appendix C to download SmartLink APP)
3.
After module is powered up, long press this button ( “Low” >= 4s ) to make the
module recover to factory setting.
High-Flying strongly suggest customer fan out this pin to connector or button for
“Manufacture” and “ Smart Link” application.
nLink Pin (LED) function：
1.
At wireless firmware and config upgrade mode , this LED used to indicate configure
and upgrade status.
2.
At “Smart Link “ config mode, this LED used to indicate APP to finish setting.
3.
At normal mode, it’s Wi-Fi link status indicator
High-Flying strongly suggest customer fan out this pin to LED.
1.2.2.
Electrical Characteristics
Absolute Maximum Ratings:
Parameter
Condition
Storage temperature range
Maximum soldering temperature
IPC/JEDEC J-STD-020
Min.
Typ.
Max.
Unit
-40
125
260
°C
°C
Supply voltage
3.6
Voltage on any I/O pin
ESD (Human Body Model HBM)
TAMB=25°C
3.6
2.5
KV
ESD (MM)
TAMB=25°C
0.25
KV
Power Supply & Power Consumption:
Parameter
Condition
Min.
Typ.
Max.
Unit
2.95
3.6
mA
Operating Supply voltage
Supply current, peak
Continuous Tx
3.3
280
Supply current, IEEE PS
DTIM=100ms
30
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HF-LPT220 Low Power WiFi Module User Manual
1.2.3.
Mechanical Size
HF-LPT220 modules physical size （Unit: mm） as follows:
Figure 1.
HF-LPT220 Mechanical Dimension
HF-LPT220 Module PCB symbol size (mm) as follows:
Figure 2.
1.2.4.
HF-LPT220 PCB Symbol Size
On-board Chip Antenna
HF-LPT220 module support internal on-board chip antenna option. When customer select internal
antenna, you shall comply with following antenna design rules and module location suggestions:

For customer PCB, RED color region (5x5mm) can’t put componet or paste GND net;

Antenna must away from metal or high components at least 10mm;

Antenna can’t be shieldedby any meal enclosure; All cover, include plastic, shall away from
antenna at least 10mm;
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HF-LPT220 Low Power WiFi Module User Manual
Figure 3.
Suggested Module Placement Region
High-Flying suggest HF-LPT220 module better locate in following region at customer board, which to
reduce the effect to antenna and wireless signal, and better consult High-Flying technical people when
you structure your module placement and PCB layout.
1.2.5.
External Antenna
HF-LPT220 module supports internal antenna and external antenna(I-PEX or SMA) option for user
dedicated application.
If user select external antenna, HF-LPT220 modules must be connected to the 2.4G antenna
according to IEEE 802.11b/g/n standards.
The antenna parameters required as follows:
Table 3
1.2.6.
HF-LPT220 External Antenna Parameters
Item
Parameters
Frequency range
2.4~2.5GHz
Impedance
VSWR
Return Loss
Connector Type
50 Ohm
2 (Max)
-10dB (Max)
I-PEX or populate directly
Evaluation Kit
High-Flying provides the evaluation kit to promote user to familiar the product and develop the detailed
application. The evaluation kit shown as below, user can connect to HF-LPT220 module with the RS232 UART, USB (Internal USB to UART convetor) or Wireless interface to configure the parameters,
manage the module or do the some functional tests.
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HF-LPT220 Low Power WiFi Module User Manual
Figure 4.
HF-LPT220 Evaluation Kit
Notes: User need download USB to UART port driver from High-Flying web or contact with technical
support people for more detail.
The external interface description for evaluation kit as follows:
Table 4
Function
External
Interface
Name
Description
RS232
Main data/command RS-232 interface
UART to USB debug interface. (For PC without
RS232, need load driver). Can be Power input.
USB
DC5-18V
EXT PORT
LED
JMP
Power
nLink
nReady
Button
HF-LPT220 Evaluation Kit Interface Description
nReset
nReload
WPS
DC jack for power in, 5~18V input.
HF-LPT220 GPIO function extend interface
connector
4Pin USB or RS232 Jumper. Left jump select USB.
3.3V Power Indicator
nLink -WiFi LINK Indicator
See 1.2.1
nReady – Module Bootup Ready Indicator
On (“low”)- Module bootup OK;
Off (“high”)- Mouule botup failed;
Twinkle- Remote Upgrade Ongoing;
Used to reset the module.
Restore factory default configuration after push this
pin more than 4s.
See 1.2.1
WPS Button
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HF-LPT220 Low Power WiFi Module User Manual
1.2.7.
Order Information
Base on customer detailed requirement, HF-LPT220 series modules provide different variants and
physical type for detailed application.
Figure 5.
1.2.8.
HF-LPT220 Order InformationTypical Application
Hardware Typical Application
Figure 6.
HF-LPT220 Hardware Typical Application
Notes:
nReset- Module hardware reset signal. Input. Logics “0” effective.
There is pull-up resister internal and no external pull-up required. When module power up or some
issue happened, MCU need assert nRST signal “0” at least 10ms, then set” 1” to keep module fully
reset.
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HF-LPT220 Low Power WiFi Module User Manual
nLink- Module WIFI connection status indication. Output.
(This pin is recommend to connect to LED, indicate status when the module in wireless
upgrade mode)
When module connects to AP (AP associated), this pin will output “0”. This signal used to judge if
module already at WiFi connection status. Thers is pull-up resister internal and no external pull-up
required. If nLink function not required, can leave this pin open.
nReady- Module boot up ready signal. Output. Logics “0” effective.
The module will output “0” after normal boot up. This signal used to judge if module finish boot up and
ready for application or working at normal mode. If nReady function not required, can leave this pin
open.
nReload- Module restore to factory default configuration.Input. Logics “0” effective.
(This pin is recommend to connect to button, is used to enter wireless upgrade mode)
User can de-assert nReload signal “0” more than 4s through button or MCU pin, then release, module
will restore to factory default configuration and re-start boot up process.. If nReload function not
required, can leave this pin open.
UART0_TXD/RXD- UART port data transmit and receive signal.
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HF-LPT220 Low Power WiFi Module User Manual
2. FUNCTIONAL DESCRIPTION
2.1. Wireless Networking
HF-LPT220 module can be configured as both wireless STA and AP base on network type. Logically
there are two interfaces in HF-LPT220. One is for STA, and another is for AP. When HF-LPT220
works as AP, other STA equipments are able to connect to HF-LPT220 module directly. Wireless
Networking with HF-LPT220 is very flexible.
Notes:
AP: that is the wireless Access Point, the founder of a wireless network and the centre of the network
nodes. The wireless router we use at home or in office may be an AP.
STA: short for Station, each terminal connects to a wireless network (such as laptops, PDA and other
networking devices) can be called with a STA device.
2.1.1.
Basic Wireless Network Based On AP (Infrastructure)
Infrastructure: it’s also called basic network. It built by AP and many STAs which join in.
The characters of network of this type are that AP is the centre, and all communication between STAs
is transmitted through the AP. The figure following shows such type of networking.
Figure 7.
2.1.2.
HF-LPT220 Basic Wireless Network Structure
Wireless Network Based On AP+STA
HF-LPT220 module support STA network mode.,
Figure 8.
HF-LPT220 STA Network Structure
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HF-LPT220 Low Power WiFi Module User Manual
2.2. Work Mode : Transparent Transmission Mode
HF-LPT220 module support serial interface transparent transmission mode. The benefit of this mode
is achieves a plug and play serial data port, and reduces user complexity furthest. In this mode, user
should only configure the necessary parameters. After power on, module can automatically connect to
the default wireless network and server.
As in this mode, the module's serial port always work in the transparent transmission mode, so users
only need to think of it as a virtual serial cable, and send and receive data as using a simple serial. In
other words, the serial cable of users’ original serial devices is directly replaced with the module; user
devices can be easy for wireless data transmission without any changes.
The transparent transmission mode can fully compatible with user’s original software platform and
reduce the software development effort for integrate wireless data transmission.
The parameters which need to configure include:



Wireless Network Parameters

Wireless Network Name（SSID）

Security Mode

Encryption Key
TCP/UDP Linking Parameters

Protocol Type

Link Type（Server or Client）

Target Port ID Number

Target Port IP Address
Serial Port Parameters

Baud Rate

Data Bit

Parity (Check) Bit

Stop Bit

Hardware Flow Control
2.3. UART Frame Scheme(Reserved)
2.3.1.
UART Free-Frame
HF-LPT220 support UART free-frame function. If user select open this function, module will check the
intervals between any two bytes when reciving UART data. If this interval time exceeds defined value
(50ms default), HF-LPT220 will think it as the end of one frame and transfer this free-frame to WiFi
port, or HF-LPT220 will receive UART data untill 1000 bytes, then transfer 1000 bytes frame to WiFi
port.
HF-LPT220’s default interval time is 50ms. User can also set this interval to fast (10ms) through AT
command. But user have to consider if user MCU can send UART data with 10ms interval ,or the
UART data may be divide as fragment.
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HF-LPT220 Low Power WiFi Module User Manual
Through AT command: AT+UARTTE=fash/normal, user can set the interval time: fast (10ms) and
normal (50ms).
2.3.2.
UART Auto-Frame
HF-LPT220 support UART auto-frame function. If user select open this function and setting auto-frame
trigger length and auto-frame trigger time parameters, then module will auto framing the data which
received from UART port and transmitting to the network as pre-defined data structure.

Auto-frame trigger length: The fixed data length that module used to transmitting to the
network.

Auto-frame trigger time: After the trigger time, if UART port received data can’t reach autoframe trigger length, then module will transmitting available data to the network and bypass
the auto-frame trigger length condition.
Detailed UART auto-frame function can refer to AT+instruction set “UARTF/UARTFT/UARTFL”
introduction.
2.4. Encryption
Encryption is a method of scrambling a message that makes it unreadable to unwanted parties,
adding a degree of secure communications. There are different protocols for providing encryption, and
the HF-LPT220 module supports following:

WEP

WPA-PSK/TKIP

WPA-PSK/AES

WPA2-PSK/TKIP

WPA2-PSK/AES
2.5. Parameters Configuration
HF-LPT220 module supports two methods to configuration parameters: Web Accessing and
AT+instruction set.
Web accessing means users can configure parameters through Web browser. When HF-LPT220
module connected to wireless network, parameters configuration is done on a PC connected to the
same wireless network.
AT+instruction set configuration means user configure parameters through serial interface command.
Refer to “AT+instruction set” chapter for more detail.
2.6. Firmware Update（Reserved, See Appendix C）
HF-LPT220 module supports two on-line upgrade methods:

Webpage Wi-Fi Upgrade

Remote Upgrade
Webpage based Wi-Fiupgrade,please refer to 3.1.8 firmware upgrade page , user can upload
firmware file from PC to HF-LPT220.
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HF-LPT220 Low Power WiFi Module User Manual
HF-LPT220 module also support upgrade from remote HTTP server, keep module connects to AP
router before execute remote HTTP upgrade. Remote upgrade have two methods: Direct Download
and Upgrade, Configure File Based Upgrade.
 Configure File Based Upgrade
AT+UPURL command to set the remote directory which the configuration file located, such as
AT+UPURL=http://www.hi-flying.com/!admin/down/
Notes: The last ’/’ can’t be remove
AT+UPFILE command to set the configuration file name, such as AT+UPFILE=config.txt
AT+UPST command to start remote Application upgrade. After excuate this command, the module will
firstly download configuration file (“config.txt”), then download the upgrade file base on the URL
address listed in the configure file.
General “config.txt” file format as following example:
[URL]=http://10.10.100.100:80/lpb.bin
[URL]= the URL address of Application.
 Direct Download and Upgrade
AT+UPURL command to set the remote directory and file name, such as:
AT+UPURL=http://www.hi-flying.com/!admin/down/,lpb.bin
After excuate this command, the module will directly download the “lpb.bin” file from remote directory
and start upgrade Application.
Notes: please contact with high-flying technical people before upgrade firmware, or maybe damage
the module and can’t work again.
2.7. SOCKET B Function
HF-LPT220 support double socket communication.
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HF-LPT220 Low Power WiFi Module User Manual
Figure 9.
Socket B function demo
2.8. Multi-TCP Link Connection(Reserved)
When HF-LPT220 module configured as TCP Server, it supports Multi-TCP link connection, and
maximum 5 TCP clients permitted to connect to HF-LPT220 module. User can realize multi-TCP link
connection at each work mode.
Multi-TCP link connection will work as following structure:
Upstream: All dates from different TCP connection or client will be transmitted to the serial port as a
sequence.
Downstream: All data from serial port (user) will be replicate and broadcast to every TCP connection
or client.
Detailed multi-TCP link data transmission structure as following figure:
Figure 10. Multi-TCP Link Data Transmition Structure
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HF-LPT220 Low Power WiFi Module User Manual
3. OPERATION GUIDELINE
3.1. Configuration
When first use HF-LPT220 modules, user may need some configuration. User can connect to HFLPT220 module’s wireless interface with following default setting information and configure the module
through laptop.
Table 8
HF-LPT220 Web Access Default Setting
Parameters
SSID
IP Address
Default Setting
HF-LPT220
10.10.100.254
Subnet Mask
255.255.255.0
3.2. Usage Introduction
3.2.1.
Software Debug Tools
High-Flying use two common software tools debugging and applying HF-LPT220 module.
(User can also select other tools used to debug serial port).
3.2.2.

Serial Debugging Software: ComTools

Ethernet Debugging Software: TCPUDPDbg
Network Connection
User can select two methods to connect HF-LPT220 module base on dedicated application.

Use HF-LPT220 STA interface. HF-LPT220 and debug PC2 connect to a wireless AP,
another PC1 (or user device) connect to HF-LPT220 module with serial port:
Figure 11. STA Interface Debug Connection

Use HF-LPT220 AP interface. Debug PC2 connect to HF-LPT220 through wireless

connection, another PC1 (or user device) connect to HF-LPT220 module with serial port.
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HF-LPT220 Low Power WiFi Module User Manual
Figure 12. AP Interface Debug Connection
3.2.3.
3.2.4.
Default Parameter Setting

Default SSID: HF-LPB100;

Deault security mode: open,none;

User UART parameter setting:115200,8,1,None;

Default network parameter setting:TCP,Server,8899,10.10.100.254;

Module IP address: dhcp,0.0.0.0,0.0.0.0,0.0.0.0;
Module Debug
PC1 open “CommTools” program, setting the same serial port parameters with HF-LPT220 module
and open serial port connection.
Figure 13. “CommTools” Serial Debug Tools
PC2 open “TCPUDPDbg” program, and create a new connection. If HF-LPT220 configured as Server
mode, “TCPUDPDbg” Tools shall create “Client “mode connection. Or otherwise, create a “Server”
mode connection.
Figure 14.
“TCPUDPDbg” Tools Create Connection
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HF-LPT220 Low Power WiFi Module User Manual
Then setting the TCP/UDP connection parameters. Default as following:
Figure 15.
“TCPUDPDbg” Tools Setting
Then, click “Create” button to create a connection.
Figure 16.
“TCPUDPDbg” Tools Connection
Now, in transparent transmission mode, data can be transferred from “CommTools” program to
“TCPUDPDbg” program, or in reverse. You can see data in receiver side will keep same as in sender
side.
3.3. Typical Application Examples
3.3.1.
Wireless Control Application
Figure 17. Wireless Control Application
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HF-LPT220 Low Power WiFi Module User Manual
For this wireless control application, HF-LPT220 works as AP mode. Module’s serial port connects to
user device. So, control agent (Smart phone for this example) can manage and control the user device
through the wireless connection with HF-LPT220 module.
3.3.2.
Remote Management Application
Figure 18. Remote Management Application
For this remote management application, HF-LPT220 works as STA mode and connects to Internet
through wireless AP. Module configured as TCP Client and communicates with remote TCP server at
Internet. Module’s serial port connects to user device.
So, user device’s data or sampling information can send to remote TCP server for storage or
processing. Also remote TCP server can send command to control and manage the user device
through the wireless network.
3.3.3.
Transparent Serial Port Application
For this transparent serial port application, two HF-LPB100 modules connect as below figures to build
up a transparent serial port connection. One HF-LPB100 works as AP mode, another HF-LPB100
works as STA mode. Make the STA device connects to AP.
Figure 19. Transparent Serial Port Application
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HF-LPT220 Low Power WiFi Module User Manual
4. AT+INSTRUCTION INTRODUCTION
4.1. Configuration Mode
When HF-LPT220 power up, it will default works as transparent transmission mode, then user can
switch to configuration mode by serial port command. HF-LPT220 UART default parameters setting as
below figure.
Figure 20. HF-LPT220 Default UART Port Parameters
In configuration mode, user can setting the module through AT+instruction set, which cover all web
page setting function.
4.1.1.
Switch to Configuration Mode
Two steps to finish switching from transparent transmission mode to configuration mode.

UART input “+++”, after module receive “+++”, and feedback “a” as confirmation.

UART input “a”, after module receive “a” and feedback “+ok” to go into
AT+instruction set configuration mode.
Figure 21. Switch to Configuration Mode
Notes:
1. When user input “+++” (No “Enter” key required), the UART port will display feedback information
“a”, and not display input information”+++” as above UART display.
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HF-LPT220 Low Power WiFi Module User Manual
2. Any other input or wrong step to UART port will cause the module still works as original mode
(transparent transmission).
3. “+++” and “a” should be input in a certain period of time to make the module switch to configuration
mode. Like the following sequence.
4.2. AT+Instruction Set Overview
User can input AT+Instruction through hyper terminal or other serial debug terminal, also can program
the AT+Instruction to script. User can also input “AT+H” to list all AT+Instruction and description to
start.
Figure 22. ”AT+H” Instruction for Help
4.2.1.
Instruction Syntax Format
AT+Instruction protocol is based on the instruction of ASCII command style, the description of syntax
format as follow.


Format Description

< >: Means the parts must be included

[ ]:
Means the optional part
Command Message
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HF-LPT220 Low Power WiFi Module User Manual
AT+[op][para-1,para-2,para-3,para-4…]

AT+:

CMD: Command string;

[op]:
Prefix of command message;
Symbol of command operator,

“=” : The command requires parameters input;

“NULL”: Query the current command parameters setting;

[para-n]: Parameters input for setting if required;

:”Enter” Key, it’s 0x0a or 0x0d in ASCII;
Notes: When input AT+Instruction, “AT+” character will display capital letter automatic and
other parts will not change as you input.

Response Message
+[op] [para-1,para-2,para-3,para-4…]


+: Prefix of response message;

RSP: Response string;

“ok” : Success

“ERR”: Failure

[op] : =

[para-n]: Parameters if query command or Error code when error happened;

: ASCII 0x0d;

: ASCIII 0x0a;
Error Code
Table 9
Error Code
-1
-2
-3
-4
-5
4.2.2.
Error Code Describtion
Description
Invalid Command Format
Invalid Command
Invalid Operation Symbol
Invalid Parameter
Operation Not Permitted
AT+Instruction Set
Table 10
AT+Instruction Set List
Instruction
Description

NULL
Managment Instruction Set
Open/Close show back function
WMODE
Set/Query Wi-Fi work mode (AP/STA)
ENTM
Set module into transparent transition mode
TMODE
Set/Query module data transfer mode
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HF-LPT220 Low Power WiFi Module User Manual
Instruction
Description
MID
Query module ID information
VER
Query module software version information
LVER
Query module detailed software version
FWSZ
Query Wi-Fi driver size
RELD
Restore to factory default setting
FCLR
Erase factory setting
Re-start module
Help
Configure Parameters Instruction Set
CFGTF
Copy User Parameters to Factory Default Parameters
UART Instruction Set
UART
Set/Query serial port parameters
UARTFT
Open/Close UART auto-frame function
UARTFT
Set/Query UART auto-frame trigger time
UARTFL
Set/Query UART auto-frame trigger length
UARTTE
Set/Query UART free-frame triggerf time between two bytes
Command Mode Set
SEND
Send Data at Command Mode
RECV
Receive Data at Command Mode
Network Instruction Set
PING
Network ”Ping” Instruction
NETP
Set/Query network protocol parameters
MAXSK
Set/Query TCP Client connection number
TCPLK
Query if TCP link already build-up
TCPTO
Set/Query TCP timeout
TCPDIS
Open/Close TCP link
SOCKB
Set/Query SOCKB parameters
TCPDISB
Open/Close SOCKB TCP link
TCPTOB
Set/Query SOCKB TCP timeout
TCPLKB
Query if SOCKB TCP link already build-up
SNDB
Send data to SOCKB in Command Mode
RCVB
Receive data from SOCKB in Command Mode
Wi-Fi STA Instruction Set (Effective when module works as STA)
WSKEY
Set/Query STA security parameters
WSSSID
Set/Query associated AP SSID parameters
WANN
Set/Query STA’s network parameters
WSMAC
Set/Query STA’s MAC address
WSLK
Query STA Wi-Fi link status
WSLQ
Query STA Wi-Fi signal strength
WSCAN
Scan AP
WSDNS
Set/Query STA’s Static DNS server address
Wi-Fi AP Instruction Set (Effective when module works as AP)
LANN
Set/Query AP’s network parameters
WAP
Set/Query AP Wi-Fi parameters
WAKEY
Set/Query AP security parameters
WAMAC
Set/Query AP MAC address
WADHCP
Set/Query AP DHCP Server status
WADMN
Set/Query AP webpage domain name
WALK
Query MAC address of STA device connecting to module AP
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HF-LPT220 Low Power WiFi Module User Manual
Instruction
Description
WALKIND
Enable/Disable indication of connection status.
WAPMXSTA
Set/Query max STA devices supported for AP.
Remote Upgrade Instruction Set
OTA
Upgrade Firmware
UPURL
Set/Query remote upgrade URL address
UPFILE
Set/Query remote upgrade configure file name
LOGSW
Open/Close remote upgrade log
LOGPORT
Set/Query UDP port of remote upgrade log
UPST
Start remote Application upgrade
Power Management Instruction Set
DISPS
Set/Query power save parameters
Network Time Set
NTPRF
Set/Query time calibration interval
NTPEN
Enable/Disable time calibration function
NTPTM
Query time
NTPSER
Set/Query NTP server IP
Others Instruction Set
WRMID
Set module ID
RLDEN
Set/Query GPIO45 status
ASWD
Set/Query WiFi configuration code
MDCH
Set Wi-Fi Auto Switch Function
TXPWR
Set/Query Wi-Fi Transmit Power
SMTLK
Start SmartLink function
SMTLKVER
Set/Query SmartLink version
WPS
Start WPS function
WPSTNEN
Enable/Disable GPIO 15 WPS function
LPTIO
nRead/nLink/WPS function mapping
WIFI
Enable/Disable Wi-Fi
SMEM
Query RAM status
NDBGL
Set UART debug information
Note: Some AT is not supported yet（The above AT command with line through）. It will
be updated for later firmware.
4.2.2.1. AT+E

Function: Open/Close show back function;

Format:

Set Operation
AT+E=
+ok

Parameters:

status: Echo status

on: Open echo

off: Close echo
When HF-LPB120 module firstly switch from transparent transmission to configuration mode, show
back status is open, input “AT+E” to close show back function, input“AT+E” again to open show back
function.
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4.2.2.2. AT+WMODE

Function: Set/Query Wi-Fi work mode. Setting is valid after reset;

Format:

Query Operation
AT+WMODE
+ok=

Set Operation
AT+WMODE=
+ok

Parameters:

mode:Wi-Fi work mode

AP

STA

APSTA
4.2.2.3. AT+ENTM

Function: Set module into transparent transmition mode;

Format:
AT+ENTM
+ok
When operate this command, module switch from configuration mode to transparent transmission
mode.
4.2.2.4. AT+TMODE

Function: Set/Query module data transfer mode. Setting is valid after reset.

Format:

Query Operation
AT+TMODE
+ok=

Set Operation
AT+TMODE=
+ok

Parameters:

tmode: data transfer mode, include:

throughput: throughput mode

cmd: command mode

pwm: PWM/GPIO mode
4.2.2.5. AT+MID

Function: Query module ID information;

Format:

Query Operation
AT+MID
+ok=
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HF-LPT220 Low Power WiFi Module User Manual

Parameters:

module_id: Module ID information;

HF-LPB120;
Notes: User can set this parameter through AT+WRMID.
4.2.2.6. AT+VER

Function: Query module software version information;

Format:

Query Operation
AT+VER
+ok=

Parameters:

ver: Module software version information;
4.2.2.7. AT+LVER

Function: Query module detailed software version information;

Format:

Query Operation
AT+LVER
+ok=

Parameters:

ver: Module software detailed version information;
4.2.2.8. AT+FWSZ

Function: Query Wi-Fi driver size;

Format:

Query Operation
AT+FWSZ
+ok=

Parametewrs:

size: Wi-Fi driver size.(Byte)

version: Wi-Fi driver version
4.2.2.9. AT+RELD

Function: module restore to factory default setting;

Format:

Set Operation
AT+RELD
+ok=rebooting…
When operate this command, module will restore to factory default setting and reboot.
4.2.2.10. AT+FCLR

Function: Erase factory setting;

Format:

Query Operation
Shanghai High-Flying Electronics Technology Co., Ltd(www.hi-flying.com)
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HF-LPT220 Low Power WiFi Module User Manual
AT+FCLR
+ok=
4.2.2.11. AT+Z

Function: Re-start module;

Format:
AT+Z
4.2.2.12. AT+H

Function: Help;

Format:

Query Operation
AT+H
+ok=

Parameters:

command help: command introduction;
4.2.2.13. AT+CFGTF

Function: Copy User Parameters to Factory Default Parameters;

Format:

Query Operation
AT+CFGTF
+ok=

Parameters:

status: feedback operation status;
4.2.2.14. AT+UART

Function: Set/Query serial port parameters. Setting is valid after reset.

Format:

Query Operation
AT+UART[=uart_num]
+ok=

Set Operation
AT+UART=[,uart_num]
+ok

Parameters:


uart_num：UART Channel, the default is UART0.

0：UART0 Channel

1：UART1 Channel
baudrate:

1200,1800,2400,4800,9600,19200,38400,57600,115200,230400,
380400,460800,921600

data_bits:


stop_bits:
Shanghai High-Flying Electronics Technology Co., Ltd(www.hi-flying.com)
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HF-LPT220 Low Power WiFi Module User Manual



1,2
parity:

NONE

EVEN

ODD
Flowctrl: (CTSRTS)

NFC: No hardware flow control

FC: hardware flow control
4.2.2.15. AT+UARTF

Function: Open/Close UART auto-frame function;

Format:

Query Operation
AT+UARTF
+ok=

Set Operation
AT+UARTF=
+ok

Parameters:

para:

disable
- Close auto-frame function;

enable
- Open auto-frame function;
4.2.2.16. AT+UARTFT

Function: Set/Query UART auto-frame trigger time;

Format:

Query Operation
AT+UARTFT
+ok=
Source Exif Data: 
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : No
Page Count                      : 65
Language                        : zh-CN
Tagged PDF                      : Yes
Title                           : GPON SFU System Design
Author                          : Kevin Qiu
Subject                         : SDC
Creator                         : Microsoft® Office Word 2007
Create Date                     : 2016:06:08 07:03:21
Modify Date                     : 2016:06:08 07:03:21
Producer                        : Microsoft® Office Word 2007
EXIF Metadata provided by EXIF.tools
FCC ID Filing: 2ACSV-HF-LPT220

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