Shanghai High-Flying Electronics Technology Co. HF-LPT120 User manual

High-Flying
HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
Shanghai High-Flying Electronics Technology Co., Ltd(www.hi-flying.com) - 1 -
HF-LPT120&HF-LPT120A
Low Power WiFi Module User Manual
V 1.6
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 External I-PEX or Internal PCB Antenna Option(HF-LPT120)
Support Copper Line Antenna(HF-LPT120A)
Single +3.3V Power Supply
Smallest Size: 22mm x 13.5mm x 6mm, 1x10 2mm Connector(HF-LPT120)
Smallest Size: 22mm x 14.3mm x 6mm, 1x10 2mm Connector(HF-LPT120A)
FCC/CE/SRRC Certificated

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HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
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TABLE OF CONTENTS
LIST OF FIGURES...................................................................................................................................5
LIST OF TABLES ....................................................................................................................................6
HISTORY..................................................................................................................................................7
1. PRODUCT OVERVIEW ................................................................................................................8
1.1. General Description.................................................................................................................8
1.1.1 Device Features..................................................................................................................8
1.1.2 Device Paremeters .............................................................................................................9
1.1.3 Key Application...................................................................................................................9
1.2. Hardware Introduction...........................................................................................................10
1.2.1. Pins Definition...................................................................................................................10
1.2.2. Electrical Characteristics ..................................................................................................11
1.2.3. Mechanical Size................................................................................................................12
1.2.4. On-board PCB Antenna....................................................................................................13
1.2.5. External Antenna ..............................................................................................................13
1.2.6. Evaluation Kit....................................................................................................................14
1.2.7. Order Information..............................................................................................................15
1.3. Typical Application................................................................................................................16
1.3.1. Hardware Typical Application ...........................................................................................16
1.4. Internal PCB Antenna............................................................................................................17
2. FUNCTIONAL DESCRIPTION ..................................................................................................19
2.1. Wireless Networking..............................................................................................................19
2.1.1. Basic Wireless Network Based On AP (Infrastructure) ....................................................19
2.1.2. Wireless Network Based On STA.....................................................................................19
2.2. Work Mode : Transparent Transmission Mode...................................................................20
2.3. Encryption ..............................................................................................................................20
2.4. Parameters Configuration.....................................................................................................20
2.5. Firmware Update....................................................................................................................21
2.6. SOCKET B Function ..............................................................................................................21
2.7. Multi-TCP Link Connection (Reserved) ...............................................................................21
3. OPERATION GUIDELINE ..........................................................................................................23
3.1. Configuration..........................................................................................................................23
3.1.1. Open Web Management Interface ...................................................................................23
3.1.2. System Page.....................................................................................................................24
3.1.3. Work Mode Page..............................................................................................................24
3.1.4. STA Setting Page .............................................................................................................25
3.1.5. AP Setting Page ...............................................................................................................26
3.1.6. Other Setting Page ...........................................................................................................26
3.1.7. Account Management Page .............................................................................................27
3.1.8. Upgrade Software Page ...................................................................................................27

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3.1.9. Restart Page.....................................................................................................................27
3.1.10. Restore Page ................................................................................................................28
3.1.11. Internal Webpage..........................................................................................................28
3.2. Usage Introduction ................................................................................................................29
3.2.1. Software Debug Tools ......................................................................................................29
3.2.2. Network Connection .........................................................................................................29
3.2.3. Default Parameter Setting ................................................................................................29
3.2.4. Module Debug...................................................................................................................30
3.3. Typical Application Examples ..............................................................................................31
3.3.1. Wireless Control Application.............................................................................................31
3.3.2. Remote Management Application.....................................................................................31
3.3.3. Transparent Serial Port Application..................................................................................32
4. AT+INSTRUCTION INTRODUCTION ......................................................................................33
4.1. Configuration Mode...............................................................................................................33
4.1.1. Switch to Configuration Mode...........................................................................................33
4.2. AT+Instruction Set Overview................................................................................................34
4.2.1. Instruction Syntax Format.................................................................................................34
4.2.2. AT+Instruction Set ............................................................................................................35
4.2.2.1. AT+E .............................................................................................................................37
4.2.2.2. AT+WMODE .................................................................................................................37
4.2.2.3. AT+ENTM .....................................................................................................................37
4.2.2.4. AT+MID.........................................................................................................................37
4.2.2.5. AT+VER ........................................................................................................................38
4.2.2.6. AT+BVER......................................................................................................................38
4.2.2.7. AT+RELD......................................................................................................................38
4.2.2.8. AT+FCLR ......................................................................................................................38
4.2.2.9. AT+Z..............................................................................................................................38
4.2.2.10. AT+H .........................................................................................................................38
4.2.2.11. AT+CFGTF................................................................................................................39
4.2.2.12. AT+UART ..................................................................................................................39
4.2.2.13. AT+NETP ..................................................................................................................40
4.2.2.14. AT+MAXSK ...............................................................................................................40
4.2.2.15. AT+TCPLK ................................................................................................................40
4.2.2.16. AT+TCPTO................................................................................................................41
4.2.2.17. AT+TCPDIS...............................................................................................................41
4.2.2.18. AT+SOCKB ...............................................................................................................41
4.2.2.19. AT+TCPDISB ............................................................................................................42
4.2.2.20. AT+TCPTOB .............................................................................................................42
4.2.2.21. AT+TCPLKB..............................................................................................................43
4.2.2.22. AT+WSSSID..............................................................................................................43
4.2.2.23. AT+WSKEY...............................................................................................................43
4.2.2.24. AT+WANN.................................................................................................................44
4.2.2.25. AT+WSMAC..............................................................................................................44
4.2.2.26. AT+WSLK..................................................................................................................45

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4.2.2.27. AT+WSLQ .................................................................................................................45
4.2.2.28. AT+WSCAN...............................................................................................................45
4.2.2.29. AT+LANN ..................................................................................................................45
4.2.2.30. AT+WAP....................................................................................................................46
4.2.2.31. AT+WAKEY...............................................................................................................46
4.2.2.32. AT+WADHCP............................................................................................................46
4.2.2.33. AT+WALK..................................................................................................................47
4.2.2.34. AT+WALKIND............................................................................................................47
4.2.2.35. AT+WAPMXSTA .......................................................................................................47
4.2.2.36. AT+OTA.....................................................................................................................48
4.2.2.37. AT+UPURL................................................................................................................48
4.2.2.38. AT+DISPS .................................................................................................................48
4.2.2.39. AT+PLANG................................................................................................................49
4.2.2.40. AT+WEBU .................................................................................................................49
4.2.2.41. AT+WRMID ...............................................................................................................49
4.2.2.42. AT+ASWD.................................................................................................................49
4.2.2.43. AT+SMTLK................................................................................................................50
4.2.2.44. AT+SMEM .................................................................................................................50
4.2.2.45. AT+NDBGL................................................................................................................50
5. PACKAGE INFORMATION ........................................................................................................52
5.1. Recommended Reflow Profile ..............................................................................................52
5.2. Device Handling Instruction (Module IC SMT Preparation)...............................................52
5.3. Shipping Information.............................................................................................................53
APPENDIX A: HW REFERENCE DESIGN......................................................................................54
APPENDIX B: HTTP PROTOCOL TRANSFER..............................................................................55
B.1. Sending HTTP Raw Data in Throughput Mode......................................................................55
APPENDIX C:REFERENCES............................................................................................................56
C.1．High-Flying Mass Production Tool........................................................................................56
C.2．SmartLink APP V7 Config Tool..............................................................................................56
C.3．EVK Quick Start Guide ...........................................................................................................56
C.4．Module Upgrade......................................................................................................................56
C.5．Other Tools..............................................................................................................................56
APPENDIX D: CONTACT INFORMATION ......................................................................................57

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HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
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LIST OF FIGURES
Figure 1. HF-LPT120 Pins Map...........................................................................................................10
Figure 2. HF-LPT120 Mechanical Dimension......................................................................................12
Figure 3. HF-LPT120A Mechanical Dimension...................................................................................13
Figure 4. Suggested Module Placement Region.................................................................................13
Figure 5. HF-LPT120 External Antenna picture ..................................................................................13
Figure 6. LPT120/LPT220 EVK...........................................................................................................14
Figure 7. HF-LPT120 Order Information..............................................................................................15
Figure 8. HF-LPT120A Order Information...........................................................................................15
Figure 9. HF-LPT120 Hardware Typical Application...........................................................................16
Figure 10. HF-LPT120 Antenna.........................................................................................................17
Figure 11. HF-LPT120 Antenna radiation pattern..............................................................................17
Figure 12. HF-LPT120 XY plane radiation pattern ............................................................................18
Figure 13. HF-LPT120XZ plane radiation pattern..............................................................................18
Figure 14. HF-LPT120YZ plane radiation pattern..............................................................................18
Figure 15. HF-LPT120 Basic Wireless Network Structure.................................................................19
Figure 16. HF-LPT120 STA Network Structure .................................................................................19
Figure 17. Socket B function demo....................................................................................................21
Figure 18. Multi-TCP Link Data Transmition Structure......................................................................22
Figure 19. Open Web Management page..........................................................................................23
Figure 20. System Web Page............................................................................................................24
Figure 21. Work Mode Page..............................................................................................................24
Figure 22. STA Setting Page .............................................................................................................25
Figure 23. STA Scan Page ................................................................................................................25
Figure 24. AP Setting Page ...............................................................................................................26
Figure 25. Other Setting Page ...........................................................................................................26
Figure 26. Account Page....................................................................................................................27
Figure 27. Upgrade SW page ............................................................................................................27
Figure 28. Restart Page.....................................................................................................................28
Figure 29. Restore Page....................................................................................................................28
Figure 30. Internal Webpage .............................................................................................................29
Figure 31. STA Interface Debug Connection.....................................................................................29
Figure 32. AP Interface Debug Connection.......................................................................................29
Figure 33. “CommTools” Serial Debug Tools ....................................................................................30
Figure 34. “TCPUDPDbg” Tools Create Connection.........................................................................30
Figure 35. “TCPUDPDbg” Tools Setting ............................................................................................31
Figure 36. “TCPUDPDbg” Tools Connection .....................................................................................31
Figure 37. Wireless Control Application.............................................................................................31
Figure 38. Remote Management Application.....................................................................................32
Figure 39. Transparent Serial Port Application..................................................................................32
Figure 40. HF-LPT120 Default UART Port Parameters.....................................................................33
Figure 41. Switch to Configuration Mode...........................................................................................33
Figure 42. ”AT+H” Instruction for Help ...............................................................................................34

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HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
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Figure 43. Reflow Soldering Profile ...................................................................................................52
Figure 44. Shipping Information.........................................................................................................53
LIST OF TABLES
HF-LPT120 Module Technical Specifications ........................................................................9Table1.
HF-LPT120 Pins Definition...................................................................................................10Table2.
Absolute Maximum Ratings:.................................................................................................11Table3.
Power Supply & Power Consumption: .................................................................................12Table4.
HF-LPT120 External Antenna Parameters ..........................................................................13
Table5.
HF-LPT120 Evaluation Kit Interface Description..................................................................14Table6.
HF-LPT120 Web Access Default Setting.............................................................................23Table7.
Error Code Describtion.........................................................................................................35Table8.
AT+Instruction Set List.........................................................................................................35Table9.
Reflow Soldering Parameter ................................................................................................52Table10.

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HISTORY
Ed. V1.02 11-03-2015 First Version.
Ed. V1.03 11-11-2015 Modify IO PIN Description.
Ed. V1.04 11-27-2015Change Module PCB.
Ed. V1.1 12-21-2015 Update AT command supported by 2.0.01 version firmware.
Ed. V1.1.1 01-04-2016 Add HF-LPT100-A Type.
Ed. V1.2 01-29-2016 Modify HF-LPT100-A to HF-LPT100A Type, 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. V1.3 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.
Ed. V1.4 04-29-2016 Update AT command supported by 2.0.06 version firmware. Add
support for AT+UPURL. Modify AT+UART flow control, modify AT+DISPS function. Update the new
EVK data. See appendix C for new firmware. See LPB120 manual for the module usage and AT
command list.
Ed. V1.5 10-25-2016 Update boot GPIO requirement.
Ed. V1.6 12-19-2016 Update 2.09-6 firmware webpage function, add the whole function into
this manual.

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HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
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1.PRODUCT OVERVIEW
1.1. General Description
The HF-LPT120 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/PWM interface for data transfer.HF-
LPT120 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-LPT120 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-LPT120 integrates all Wi-Fi functionality into a low-profile, 22mm x 13.5mm x 6mm module
package that can be easily mounted on main PCB with application specific circuits. Also, module
provides built-in antenna, external antenna option.
The HF-LPT120A module add shield and has passed FCC/CE/SRRC, the following description all use
HF-LPT120 for the common function.
1.1.1 Device Features
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 External I-PEX or Internal PCB Antenna Option(HF-LPT120)
Support Copper Line Antenna(HF-LPT120A)
Single +3.3V Power Supply
Smallest Size: 22mm x 13.5mm x 6mm, 1x10 2mm Connector(HF-LPT120)
Smallest Size: 22mm x 14.3mm x 6mm, 1x10 2mm Connector(HF-LPT120A)
FCC/CE/SRRC Certificated

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1.1.2 Device Paremeters
HF-LPT120 Module Technical SpecificationsTable1.
Class
Item
Parameters
Wireless
Parameters
Certification
FCC/CE/SRRC/RoHS
Wireless standard
802.11 b/g/n
Frequency range
2.412GHz-2.484GHz
Transmit Power
802.11b: +16 +/-2dBm (@11Mbps)
802.11g: +14 +/-2dBm (@54Mbps)
802.11n: +13 +/-2dBm (@HT20, MCS7)
Receiver Sensitivity
802.11b: -87 dBm (@11Mbps ,CCK)
802.11g: -73 dBm (@54Mbps, OFDM)
802.11n: -71 dBm (@HT20, MCS7)
Antenna Option
HF-LPT120
External:I-PEX Connector
Internal:PCB Printed Antenna
Antenna Option
HF-LPT120A
Internal: Copper Line Antenna
Hardware
Parameters
Data Interface
UART
GPIO
Operating Voltage
2.95~3.6V
Operating Current
Peak (Continuous TX): 280mA
Average(STA, Continuous TX): 100mA
Average(STA, No TX data). 30mA
Average(AP): 120mA
Operating Temp.
-20℃- 85℃
Storage Temp.
-40℃- 125℃
Dimensions and Size
22mm x 13.5mm x 6mm(HF-LPT120)
Dimensions and Size
22mm x 14.3mm x 6mm(HF-LPT120A)
External Interface
1x10, 2mm DIP
Software
Parameters
Network Type
STA /AP
Security Mechanisms
WEP/WPA-PSK/WPA2-PSK
Encryption
WEP64/WEP128/TKIP/AES
Update Firmware
Local Wireless, Remote
Customization
Support customization and SDK
Network Protocol
IPv4, TCP/UDP/HTTP
User Configuration
AT+instruction set. Android/ iOS
Smart Link APP tools
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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1.2. Hardware Introduction
1.2.1. Pins Definition
Figure 1. HF-LPT120 Pins Map
HF-LPT120 Pins DefinitionTable2.
Pin
Description
Net Name
Signal
Type
Comments
1
Ground
GND
Power
2
+3.3V Power
DVDD
Power
3.3V@300mA
3
Restore
Configuration
nReload
I/O,PU
nReload Function
GPIO_2, Leave it if not use
Detailed functions see <Notes>
4
Module Reset
EXT_RESETn
I,PU
“Low” effective hardware reset input.
Leave it if not use
5
UART0
UART0_RX
I
UART0 Communication Input
GPIO_19
6
UART0
UART0_TX
O,PU
UART0 Communication Output
GPIO_20
7
UART1_TXD
GPIO_5
I/O,PU
UART1 Debug Output
GPIO_5, Leave it if not use
Detailed functions see <Notes>
8
UART1_RXD
GPIO_6
I/O
UART1 Debug Input
GPIO_6, Leave it if not use
Detailed functions see <Notes>
9
GPIO_3
nReady
I/O
nReady Function
GPIO_3, Leave it if not use
Detailed functions see <Notes>
10
GPIO_15
nLink
I/O
nLink Function
GPIO_15, Leave it if not use
Detailed functions see <Notes>
<Notes>
When bootup, module PIN6/PIN7 must be high，otherwise the module fail to work

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I—Input, O—Output,PU—Internal Pullup Resistor；I/O: Digital I/O；Power—Power
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 D 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 ) and loose to make
the module go into “Smart Link “ config mode, waiting for APP to set password and
other information. (See Appendix D to download SmartLink APP)
3. After module is powered up, long press this button ( “Low” > 4s ) and loose 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.
nReady Pin (LED) function(Low effective)：
1. OS initial finished indicator. Only after this pin output low, can the UART function be
used.
nLink Pin (LED) function(Low effective)：
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.
UART1 Debug ：
1. Enable UART1 log information output by AT+NDBGL=1,1 via UART0, UART1 baud
rate is fixed at 115200.
2. After UART1 is enabled, it will output system run log information and it can direct
process AT command(No need to enter command mode like UART0)
1.2.2. Electrical Characteristics
Absolute Maximum Ratings:
Table3.
Parameter
Condition
Min.
Typ.
Max.
Unit
Storage temperature range
-40
125
°C
Maximum soldering temperature
IPC/JEDEC J-STD-020
260
°C
Supply voltage
0
3.6
V
Voltage on any I/O pin
0
3.6
V
ESD (Human Body Model HBM)
TAMB=25°C
2.5
KV
ESD (MM)
TAMB=25°C
0.25
KV

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Power Supply & Power Consumption:
Table4.
Parameter
Condition
Min.
Typ.
Max.
Unit
Operating Supply voltage
2.95
3.3
3.6
V
Supply current, peak
Continuous Tx
280
mA
Supply current,
STA No data transfer
30
mA
Supply current,
STA Continuous data transfer
100
mA
Supply current,
AP
120
mA
1.2.3. Mechanical Size
HF-LPT120 modules physical size （Unit: mm）as follows:
Figure 2. HF-LPT120 Mechanical Dimension

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Figure 3. HF-LPT120A Mechanical Dimension
1.2.4. On-board PCB Antenna
HF-LPT120 module support internal on-board PCB 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 (8x10mm) can’t put componet or paste GND net;
Antenna must away from metal or high components at least 10mm;
Antenna can’t be shielded by any metal enclosure;
Figure 4. Suggested Module Placement Region
High-Flying suggest HF-LPT120 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-LPT120 supports two way of external antenna as the following picture show, The I-PEX interface
or the PAD interface(remove the I-PEX connector). The user may choose one of them. If user select
external antenna, HF-LPT120 modules must be connected to the 2.4G antenna according to IEEE
802.11b/g/n standards. We can provide external antenna if needed. Contact with our salesman.
The antenna parameters required as follows:
Figure 5. HF-LPT120 External Antenna picture
HF-LPT120 External Antenna ParametersTable5.
Item
Parameters
Frequency range
2.4~2.5GHz
Impedance
50 Ohm
VSWR
2 (Max)
Return Loss
-10dB (Max)
Connector Type
I-PEX or populate directly

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1.2.6. 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-LPT120 module with the RS-
232 UART, or Wireless interface to configure the parameters, manage the module or do the some
functional tests. The EVK support .5V DC power supply.
Figure 6. LPT120/LPT220 EVK
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:
HF-LPT120 Evaluation Kit Interface DescriptionTable6.
Function
Name
Description
External
Interface
RS232
Main data/command RS-232 interface
USB
USB to UART interface
DC5V
DC jack for power in, 5V input.
LED
Power
Power LED
Ready
nReady LED
Link
nLink LED
Button
nReload
Restore factory default configuration after push this
pin more than 4s.
See 1.2.1

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1.2.7. Order Information
Base on customer detailed requirement, HF-LPT120 series modules provide different variants and
physical type for detailed application.
Figure 7. HF-LPT120 Order Information
Figure 8. HF-LPT120A Order Information

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1.3. Typical Application
1.3.1. Hardware Typical Application
Figure 9. HF-LPT120 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.
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.
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.
nLink- Module WIFI connection status indication. Output.
(This pin is recommend to connect to LED, indicate status when the module in wireless
upgrade mode)

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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.
1.4. Internal PCB Antenna
Figure 10. HF-LPT120 Antenna
Antenna radiation efficiency 49.2%
Figure 11. HF-LPT120 Antenna radiation pattern
XY plane maximum gain:-1.21dB, minimum gain: -31.55dB

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HF-LPT120&HF-LPT120A Low Power WiFi Module User Manual
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Figure 12. HF-LPT120 XY plane radiation pattern
XZ plane maximum gain:-0.99dB, minimum gain:-1.6dB
Figure 13. HF-LPT120XZ plane radiation pattern
YZ plane maximum gain:-0.99dB, minimum gain:-11.52dB
Figure 14. HF-LPT120YZ plane radiation pattern

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2.FUNCTIONAL DESCRIPTION
2.1. Wireless Networking
HF-LPT120 module can be configured as both wireless STA and AP base on network type. Logically
there are two interfaces in HF-LPT120. One is for STA, and another is for AP. When HF-LPT120
works as AP, other STA equipments are able to connect to HF-LPT120 module directly. Wireless
Networking with HF-LPT120 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 15. HF-LPT120 Basic Wireless Network Structure
2.1.2. Wireless Network Based On STA
HF-LPT120 module support STA network mode.
Figure 16. HF-LPT120 STA Network Structure

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2.2. Work Mode : Transparent Transmission Mode
HF-LPT120 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. 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-LPT120 module supports following:
WEP
WPA-PSK/TKIP
WPA-PSK/AES
WPA2-PSK/TKIP
WPA2-PSK/AES
2.4. Parameters Configuration
HF-LPT120 module supports two methods to configuration parameters: AT+instruction set.