High Flying Electronics Technology HF LPT220 User Manual
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 Device Features ........................................................................................................... 11
1.1.2 Device Paremeters....................................................................................................... 12
1.1.3 Key Application ............................................................................................................ 12
1.2. 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
2. FUNCTIONAL DESCRIPTION .............................................................................................. 20
2.1. 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
3. 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
3.3.2. Remote Management Application ................................................................................. 28
3.3.3. Transparent Serial Port Application ................................ ................................ .............. 28
4. AT+INSTRUCTION INTRODUCTION ................................................................................... 29
4.1. Configuration Mode .......................................................................................................... 29
4.1.1. Switch to Configuration Mode ....................................................................................... 29
4.2. 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
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
5. 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 HF-LPT220 Module Technical Specifications
Class Item Parameters
Certification FCC/CE
Wireless standard 802.11 b/g/n
Frequency range 2.412GHz-2.462GHz
Wireless
Parameters
Hardware
Parameters
Software
Parameters
Transmit Power
Receiver Sensitivity
Antenna Option
Data Interface
Operating Voltage 2.95~3.6V
Operating Current
Operating Temp.
Storage Temp.
Dimensions and Size 22mm×13.5mm×3.8mm
Network Type STA /AP
Security Mechanisms WEP/WPA-PSK/WPA2-PSK
Encryption WEP64/WEP128/TKIP/AES
Update Firmware Local Wireless, Remote
Customization Support SDK for application develop
Network Protocol IPv4, TCP/UDP/HTTP
User Configuration
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
Average. ~30mA, Peak: 280mA
-20℃- 85℃
-40℃- 125℃
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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HF-LPT220 Low Power WiFi Module User Manual
1.2. Hardware Introduction
1.2.1. Pins Definition
HF-LPT220 Pins Map
Table 2 HF-LPT220 Pins Definition
Pin Describtion Net Name Signal Type
1 N.C No connect
2 N.C No connect
3 N.C No connect
4 PWM/GPIO GPIO_8 I/O,PU GPIO_8
5 UART0 UART0_TX O,PU GPIO_20
6 UART0 UART0_RX I GPIO_19
7 UART0 UART0_CTS I/O GPIO6/UART1_RXD
UART1 Debug Information Input
8 UART0 UART0_RTS I/O GPIO5/UART1_TXD
UART1 Debug Information Output
9 GPIO GPIO_1 I/O,PU GPIO1
10 Module Reset EXT_RESETn I,PU “Low” effective reset input.
11 Module Boot Up Indicator nReady O “0” – Boot-up OK;
12 Multi-Function nReload I,PU
13 Wi-Fi Status nLink O “0” – Wi-Fi connect to router
14 GPIO18 GPIO18 I/O GPIO_18
15 +3.3V Power DVDD Power
16 Ground GND Power
17 2.4GHz Antenna PAD Ant_2.4G O 50ohm Impendence
Detailed functions see <Notes>
“1” – Wi-Fi unconncted;
Detailed functions see <Notes>
Comments
“1” – Boot-up No OK;
GPIO_3
GPIO_2
GPIO_15
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HF-LPT220 Low Power WiFi Module User Manual
<Notes>
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 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
Power Supply & Power Consumption:
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, IEEE PS DTIM=100ms 30 mA
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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. HF-LPT220 PCB Symbol Size
1.2.4. 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
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
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 HF-LPT220 External Antenna Parameters
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-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
Function
Name
Description
External
Interface
RS232
Main data/command RS-232 interface
USB
UART to USB debug interface. (For PC without
RS232, need load driver). Can be Power input.
DC5-18V
DC jack for power in, 5~18V input.
EXT PORT
HF-LPT220 GPIO function extend interface
connector
JMP
4Pin USB or RS232 Jumper. Left jump select USB.
LED
Power
3.3V Power Indicator
nLink
nLink -WiFi LINK Indicator
See 1.2.1
nReady
nReady – Module Bootup Ready Indicator
On (“low”)- Module bootup OK;
Off (“high”)- Mouule botup failed;
Twinkle- Remote Upgrade Ongoing;
Button
nReset
Used to reset the module.
nReload
Restore factory default configuration after push this
pin more than 4s.
See 1.2.1
WPS
WPS Button
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 HF-LPT220 Evaluation Kit Interface Description
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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. HF-LPT220 Order InformationTypical Application
1.2.8. 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. HF-LPT220 Basic Wireless Network Structure
2.1.2. Wireless Network Based On AP+STA
HF-LPT220 module support STA network mode.,
Figure 8. HF-LPT220 STA Network Structure
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