High Flying Electronics Technology HF LPB135 User Manual
HF-LPB135 Series Low Power WiFi Module User Manual
Support IEEE802.11b/g/n Wireless Standards
Based on Cortex-M4 SOC, 160MHz CPU, 352KB RAM for 1MB Flash Version, 384KB for
Support UART Data Communication Interface
Support Work As STA/AP/AP+STA Mode
Support SmartLink V8 Function (Provide APP SDK)
Support SmartAPLink Function
Support WeChat Airkiss 2.0
Support Wireless and Remote Firmware Upgrade Function
Support Software SDK for Develop
Support Different Antenna Option
HF-LPB135：Internal PCB or External IPEX
Single +5V Power Supply for HF-LPB135
Small Size:
HF-LPB135
Low Power WiFi Module User Manual
V 1.9
Overview of Characteristic
2MB Flash
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HF-LPB135 Series Low Power WiFi Module User Manual
HF-LPB135：41.3mm x 24.1mm x 6mm, 4Pin 2.54mm connectoer
FCC/CE/SRRC/RoHS Certificated
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HF-LPB135 Series Low Power WiFi Module User Manual
TABLE OF CONTENTS
LIST OF FIGURES.................................................................................................................................................7
LIST OF TABLES
HISTORY................................................................................................................................................................. 9
1. PRODUCT OVERVIEW
1.1. General Description
1.1.1 Key Application
1.1.2 Device Paremeters
1.2. Hardware Introduction
1.2.1. HF-LPB135 Pins Definition
1.2.2. Electrical Characteristics
1.2.3. HF-LPB135 Mechanical Size
1.2.4. External Antenna
1.2.5. Evaluation Kit
1.2.6. Order Information
1.2.7. Hardware Typical Application
2. FUNCTION AL DESCRIPTION.............................................................................................................21
2.1. Wireless Networking......................................................................................................................... 21
2.1.1. Basic Wireless Network Based On AP..................................................................................... 21
2.1.2. Wireless Network Based On STA..............................................................................................21
2.2. Work Mode : Transparent Transmission Mode..........................................................................22
2.3. Encryption............................................................................................................................................22
2.4. Parameters Configuration............................................................................................................... 22
2.5. Firmware Update................................................................................................................................ 23
2.6. SOCKET B Function.......................................................................................................................... 23
2.7. Multi-TCP Link Connection............................................................................................................. 23
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3. OPERA TION GUIDEL INE..................................................................................................................... 25
3.1. Configuration...................................................................................................................................... 25
3.1.1. Open Web Management Interface............................................................................................ 25
3.1.2. System Page.................................................................................................................................26
3.1.3. Work Mode Page..........................................................................................................................27
3.1.4. STA Setting Page.........................................................................................................................27
3.1.5. AP Setting Page........................................................................................................................... 29
3.1.6. Other Setting Page...................................................................................................................... 29
3.1.7. Account Management Page....................................................................................................... 30
3.1.8. Upgrade Software Page..............................................................................................................30
3.1.9. Restart Page................................................................................................................................. 30
3.1.10. Restore Page............................................................................................................................ 31
3.1.11. Internal Webpage..................................................................................................................... 31
3.2. Usage Introduction............................................................................................................................ 32
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HF-LPB135 Series Low Power WiFi Module User Manual
3.2.1. Software Debug Tools................................................................................................................. 32
3.2.2. Network Connection.................................................................................................................... 32
3.2.3. Default Parameter Setting.......................................................................................................... 32
3.2.4. Module Debug.............................................................................................................................. 33
3.3. Typical Application Examples........................................................................................................ 34
3.3.1. Wireless Control Application...................................................................................................... 34
3.3.2. Remote Management Application............................................................................................. 35
3.3.3. Transparent Serial Port Application.......................................................................................... 35
4. AT+INSTRUCTION INTRODU CTIO N
4.1. Configuration Mode
...........................................................................................................................
4.1.1. Switch to Configuration Mode
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4.1.2. Send AT Command in Transparent Transmission Mode
4.2. AT+Instruction Set Overview
4.2.1. Instruction Syntax Format
4.2.2. AT+Instruction Set
4.2.2.1. AT+E
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4.2.2.2. AT+CMDPW
4.2.2.3. AT+WMODE
4.2.2.4. AT+ENTM
4.2.2.5. AT+TMODE
4.2.2.6. AT+MID
4.2.2.7. AT+VER
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4.2.2.8. AT+BVER
4.2.2.9. AT+HWVER
4.2.2.10. AT+RELD
4.2.2.11. AT+FCLR
4.2.2.12. AT+Z
4.2.2.13. AT+H
.......................................................................................................................................
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4.2.2.14. AT+CFGTF
4.2.2.15. AT+UART
4.2.2.16. AT+PING
4.2.2.17. AT+NETP
4.2.2.18. AT+MAXSK
4.2.2.19. AT+TCPLK
4.2.2.20. AT+TCPTO
4.2.2.21. AT+TCPDIS
4.2.2.22. AT+SEND
4.2.2.23. AT+RECV
4.2.2.24. AT+SOCKB
4.2.2.25. AT+TCPDISB
4.2.2.26. AT+TCPTOB
4.2.2.27. AT+TCPLKB
4.2.2.28. AT+SNDB
4.2.2.29. AT+RCVB
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HF-LPB135 Series Low Power WiFi Module User Manual
4.2.2.30. AT+UDPLCPT...................................................................................................................... 49
4.2.2.31. AT+WSSSID......................................................................................................................... 49
4.2.2.32. AT+WSKEY...........................................................................................................................50
4.2.2.33. AT+WANN............................................................................................................................. 50
4.2.2.34. AT+WSMAC..........................................................................................................................51
4.2.2.35. AT+WSLK..............................................................................................................................51
4.2.2.36. AT+WSLKO...........................................................................................................................51
4.2.2.37. AT+WSLQ............................................................................................................................. 52
4.2.2.38. AT+WSCAN.......................................................................................................................... 52
4.2.2.39. AT+LANN.............................................................................................................................. 52
4.2.2.40. AT+WAP................................................................................................................................ 52
4.2.2.41. AT+WAKEY...........................................................................................................................53
4.2.2.42. AT+WADHCP....................................................................................................................... 53
4.2.2.43. AT+WALK..............................................................................................................................54
4.2.2.44. AT+WALKIND....................................................................................................................... 54
4.2.2.45. AT+WAPMXSTA.................................................................................................................. 54
4.2.2.46. AT+MDCH............................................................................................................................. 54
4.2.2.47. AT+OTA................................................................................................................................. 55
4.2.2.48. AT+UPURL............................................................................................................................55
4.2.2.49. AT+DISPS............................................................................................................................. 55
4.2.2.50. AT+PLANG............................................................................................................................56
4.2.2.51. AT+WEBU............................................................................................................................. 56
4.2.2.52. AT+WRMID........................................................................................................................... 56
4.2.2.53. AT+ASWD............................................................................................................................. 57
4.2.2.54. AT+SMTLK............................................................................................................................57
4.2.2.55. AT+WPS................................................................................................................................ 57
4.2.2.56. AT+NDBGL........................................................................................................................... 57
4.2.2.57. AT+TYPE...............................................................................................................................58
4.2.2.58. AT+SMEM............................................................................................................................. 58
4.2.2.59. AT+WIFI.................................................................................................................................58
4.2.2.60. AT+SMARTAPCONFIG...................................................................................................... 59
4.2.2.61. AT+SMARTAPSTART.........................................................................................................59
4.2.2.62. AT+BTWAIT.......................................................................................................................... 59
5. PACKA GE INFORMATION
5.1. Recommended Reflow Profile
5.2. Device Handling Instruction (Module IC SMT Preparation)
5.3. HF-LPB130/HF-LPT230 Shipping Information
5.4. HF-LPT130A Shipping Information
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APPENDIX A: HW REFERE NCE DESI GN...............................................................................................63
APPENDIX B: HTTP PROTOCOL TR ANSFE R
B.1. Sending HTTP Raw Data in Throughput Mode
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APPENDIX C:REFERE NCES....................................................................................................................... 65
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HF-LPB135 Series Low Power WiFi Module User Manual
C.1．High-Flying Mass Production Tool
C.2．SmartLink APP V8 Sniffer Config Tool
C.3．SDK
APPENDIX D: CONTACT INFORMA TION
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HF-LPB135 Series Low Power WiFi Module User Manual
LIST OF FIGURES
Figure 1. HF-LPB135-10 Appearance........................................................................................................... 13
Figure 2. HF-LPB135 Pins Map......................................................................................................................13
Figure 3. HF-LPB135 Mechanical Dimension.............................................................................................. 16
Figure 4. HF-LPB130 EVK.............................................................................................................................. 17
Figure 5. HF-LPT230 EVK...............................................................................................................................18
Figure 6. HF-LPB135 Order Information....................................................................................................... 19
Figure 7. HF-LPB135 Hardware Typical Application...................................................................................19
Figure 8. HF-LPB135 Basic Wireless Network Structure........................................................................... 21
Figure 9. HF-LPB135 STA Network Structure..............................................................................................21
Figure 10. Socket B function demo.............................................................................................................. 23
Figure 11. Multi-TCP Link Data Transmition Structure............................................................................. 24
Figure 12. Open Web Management page................................................................................................... 25
Figure 13. 1MB Flash Version webpage..................................................................................................... 26
Figure 14. System Web Page....................................................................................................................... 26
Figure 15. Work Mode Page..........................................................................................................................27
Figure 16. STA Setting Page.........................................................................................................................28
Figure 17. STA Scan Page............................................................................................................................ 28
Figure 18. AP Setting Page........................................................................................................................... 29
Figure 19. Other Setting Page...................................................................................................................... 29
Figure 20. Account Page................................................................................................................................30
Figure 21. Upgrade SW page........................................................................................................................30
Figure 22. Restart Page................................................................................................................................. 31
Figure 23. Restore Page................................................................................................................................ 31
Figure 24. Internal Webpage......................................................................................................................... 32
Figure 25. STA Interface Debug Connection..............................................................................................32
Figure 26. AP Interface Debug Connection................................................................................................ 32
Figure 27. “CommTools” Serial Debug Tools............................................................................................. 33
Figure 28. “TCPUDPDbg” Tools Create Connection.................................................................................33
Figure 29. “TCPUDPDbg” Tools Setting......................................................................................................34
Figure 30. “TCPUDPDbg” Tools Connection.............................................................................................. 34
Figure 31. Wireless Control Application...................................................................................................... 34
Figure 32. Remote Management Application............................................................................................. 35
Figure 33. Transparent Serial Port Application.......................................................................................... 35
Figure 34. HF-LPB135 Default UART Port Parameters............................................................................36
Figure 35. Switch to Configuration Mode.................................................................................................... 36
Figure 36. ”AT+H” Instruction for Help.........................................................................................................38
Figure 37. Reflow Soldering Profile.............................................................................................................. 61
Figure 38. HF-LPB130/HF-LPT230 Shipping Information........................................................................ 62
Figure 39. Shipping Information....................................................................................................................62
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HF-LPB135 Series Low Power WiFi Module User Manual
LIST OF TABLES
Table1. HF-LPB135 Module Technical Specifications............................................................................. 12
Table2. HF-LPB135 Pins Definition.............................................................................................................13
Table3. Absolute Maximum Ratings:...........................................................................................................15
Table4. Power Supply & Power Consumption:.......................................................................................... 15
Table5. HF-LPB135 External Antenna Parameters.................................................................................. 17
Table6. HF-LPB135 Evaluation Kit Interface Description........................................................................ 18
Table7. HF-LPB135 Web Access Default Setting..................................................................................... 25
Table8. Error Code Describtion....................................................................................................................39
Table9. AT+Instruction Set List.................................................................................................................... 39
Table10. Reflow Soldering Parameter.......................................................................................................... 61
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HF-LPB135 Series Low Power WiFi Module User Manual
HISTORY
Ed. V0.2 07-25-2017 Internal Version.
Ed. V0.2 08-22-2017 Release Version
Ed. V1.1 13-10-2017 Add HF-LPT130A type module
Ed. V1.2 10-11-2017 Add HF-LPB130 type module
Ed. V1.3 03-01-2018 Update HF-LPT230 Pin，webpage config.
Ed. V1.4 03-01-2018 Add HF-LPT330 type, correct working temperature,voltage.
Ed. V1.5 04-28-2018 Add HF-LPB135 type, add 4.10.14 version software function. Add
AT+TMODE, AT+PING, AT+BVER, AT+HWVER, AT+SMEM and others.
Ed. V1.6 06-15-2018 Delete 4MB version, add HF-LPT230-0 type
Ed. V1.7 08-08-2018 Add HF-LPT230-0 size, add HF-LPT130B type and 4.12.07 firmware new
function(AT+CMDPW,AT+MDCH).
Ed. V1.8 10-10-2018 Add 4.12.14 version AT+SMARTAPCONFIG, AT+SMARTAPSTART,
AT+BTWAIT command
Ed. V1.9 12-11-2018 Add AT+WSLKO command, fix LPB130 size picture error.
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HF-LPB135 Series Low Power WiFi Module User Manual
1. PRODUCT OVERVIEW
1.1. General Description
1.1.1 Key Application
Remote equipment monitoring
Asset tracking and telemetry
Security
Industrial sensors and controls
Home automation
Medical devices
The HF-LPB135 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.HF-
LPB135 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-LPB135 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-LPB135 series Wi-Fi modules provide different package with different size called HF-
LPB130/HF-LPT230/HF-LPT130A/B(T means tiny). It is pin to pin compatible for HF-LPB100/HF-
LPB120, HF-LPT200/HF-LPT220, HF-LPT100F/HF-LPT120A modules.
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HF-LPB135 Series Low Power WiFi Module User Manual
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
this device may not cause harmful interference, and
this device must accept any interference received, including interference that may cause
undesired operation.
Any changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
Please notice that if the FCC identification number is not visible when the module is installed
inside another device, then the outside of the device into which the module is installed must also
display a label referring to the enclosed module. This exterior label can use wording such as the
following: “Contains FCC ID:2ACSV-HF-LPB135” any similar wording that expresses the same
meaning may be used.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum distance of 20cm
between the radiator & your body. This transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter.
The module is limited to OEM installation ONLY.
The OEM integrator is responsible for ensuring that the end-user has no manual instruction to
remove or install module.
The module is limited to installation in mobile application.
A separate approval is required for all other operating configurations, including portable
configurations with respect to Part 2.1093 and difference antenna configurations.
There is requirement that the grantee provide guidance to the host manufacturer for compliance
with Part 15B requirements.
The OEM integrator is responsible for ensuring that the end-user has no manual instructions to
remove or install module.
The module is limited to installation in mobile or fixed application.
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HF-LPB135 Series Low Power WiFi Module User Manual
1.1.2 Device Paremeters
Table1. HF-LPB135 Module Technical Specifications
Class
Item
Parameters
Wireless
Parameters
Certification
FCC/CE/SRRC/RoHS
Wireless standard
802.11 b/g/n
Frequency range
2400MHz-2483.5MHz
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-LPB130:
Internal: PCB antenna
External: IPEX antenna
HF-LPT230:
Internal: PCB antenna
External: IPEX antenna
HF-LPT130A:
Internal: Copper Line antenna
External: IPEX antenna
HF-LPT130B:
Internal: PCB antenna
HF-LPT330:
Internal: PCB antenna
HF-LPB135:
Internal: PCB antenna
External: IPEX antenna
Hardware
Parameters
Data Interface
UART
GPIO,SPI
Operating Voltage
2.9~4.2V
Operating Current
Peak (Continuous TX): 260mA
Average(STA, No data): 25mA
Average(STA, Continuous TX): 32mA
Average(AP): 80mA
Operating Temp.
-40℃- 85℃
0℃- 105℃(High Temperate Version)
Storage Temp.
-40℃- 125℃
Density
<85%
Dimensions and Size
HF-LPB130:
23.1mm x 32.8mm x 3.5mm
HF-LPT230:
22mm x 13.5mm x 3mm
HF-LPT130A:
22mm x 14.3mm x 8mm
HF-LPT130B:
22mm x 15.6mm x 8mm
HF-LPT330:
24 mm x 16mm x 3mm
HF-LPB135:
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HF-LPB135 Series Low Power WiFi Module User Manual
41.3mm x 24.1mm x 6mm
Software
Parameters
Network Type
STA/AP/AP+STA
Security Mechanisms
WEP/WPA-PSK/WPA2-PSK
Encryption
WEP64/WEP128/TKIP/AES
Update Firmware
Local Wireless, Remote OTA
Customization
Support SDK for application develop
Network Protocol
IPv4, TCP/UDP/HTTP/TLS(SDK)
User Configuration
AT+instruction set. Android/ iOS
SmartLink APP tools
1.2. Hardware Introduction
Figure 1. HF-LPB135-10 Appearance
1.2.1. HF-LPB135 Pins Definition
Figure 2. HF-LPB135 Pins Map
Table2. HF-LPB135 Pins Definition
PinDescribtion
Net Name
Signal Type
Comments
1
+5V Power
DVDD
Power
5V@300mA
2
Ground
GND
Power
Ground
3
UART0_RX
UART0_RX
I
5V UART0 Communication Input
GPIO1
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HF-LPB135 Series Low Power WiFi Module User Manual
PinDescribtion
Net Name
Signal Type
Comments
4
UART0_TX
UART0_TX
O
5V UART0 Communication Output
GPIO2
5
Multi-Function
nReload
IPU/O
Detailed functions see <Notes>
GPIO25, PWM3
6
Module Reset
EXT_RESETn
I,PU
“Low” effective reset input.
There is RC reset circuit
internally. External pull-up
resistor is not allowed.
7
GPIO0
GPIO0
I/O
GPIO0
8
GPIO13
GPIO13
I/O
GPIO13
Debug RX
UART1_RXD
I
3.3V UART1 Debug Input
Debug TX
UART1_TXD
O
3.3V UART1 Debug Output
1. When this pin is set to “low” during module boot up, the module will enter wireless
2. After module is powered up, short press this button (0.2s < “Low” < 1.5s) and loose
3. After module is powered up, long press this button ( “Low” > 4s ) and loose to make
1. OS initial finished indicator. Only after this pin output low, can the UART function be
1. At wireless firmware and config upgrade mode , this LED used to indicate configure
2. At “SmartLink” config mode, this LED is used to indicate APP to finish setting.
3. At normal mode, it’s Wi-Fi link status indicator. Output Low when STA mode connect
<Notes>
I — Input；O — Output
PU—Internal Resistor Pull Up； I/O: Digital I/O； Power—Power Supply
nReload Pin (Button) function：
firmware and config upgrade mode. This mode is used for customer manufacture.
(See Appendix to download software tools for customer batch configuration and
upgrade firmware during mass production)
to make the module go into “SmartLink “ config mode, waiting for APP to set
password and other information. (See Appendix to download SmartLink V8 and
SmartAPLink APP)
the module recover to factory setting.
High-Flying strongly suggest customer fan out this pin to connector or button for
“Manufacture” upgrade or “ SmartLink” application.
nReady Pin (LED) function(Low effective)：
used.
nLink Pin (LED) function(Low effective)：
and upgrade status.
to router AP or other STA connect to it when in AP mode.
High-Flying strongly suggest customer fan out this pin to LED.
PWM function：
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HF-LPB135 Series Low Power WiFi Module User Manual
1. Is used for debug log or firmware program, baud rate 921600.
2. Can be used for communication in SDK.
1.2.2. Electrical Characteristics
Table3. Absolute Maximum Ratings:
Parameter
Condition
Min.
Typ.
Max.
Unit
Work temperature range
-40
105
°C
Maximum soldering temperature
IPC/JEDEC J-STD-020
260
°C
ESD (Human Body Model HBM)
TAMB=25°C
2.5
KV
ESD (MM)
TAMB=25°C
0.25
KV
Table4. Power Supply & Power Consumption:
Parameter
Condition
Min.
Typ.
Max.
Unit
Operating Supply voltage
2.9
3.3
4.2
V
Supply current, peak
Continuous Tx
260
mA
Supply current,
STA No data transfer
27
mA
Supply current,
STA Continuous data transfer
35
mA
Supply current,
AP80mA
GPIO sink current
GND+0.5V
3
mA
GPIO pull current
VCC-0.5V
3
mA
PWM0~PWM3 100ns period(if duty is from 0~255, then the maximum frequenry is
10M/256=39KHz), PWM4 support 800ns period.
Due to PWM pin is internal weak pull-up. So when these pins are used for LED bulb
application, suggest to add strong pull-down resistor to revent the lulb on when boot.
Note：nReload pin is also used for special function, when use this pin for PWM bulb
application and add external pull-down resistor, this will cause the module wait 1 second
when bootup(wait “space” key to etner bootloader). Contact us to provice special
bootloader in order to remove this wait time.
UART1 Debug ：
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HF-LPB135 Series Low Power WiFi Module User Manual
1.2.3. HF-LPB135 Mechanical Size
Figure 3. HF-LPB135 Mechanical Dimension
1.2.4. External Antenna
HF-LPB135 modules physical size （Unit: mm） as follows:
HF-LPB135 series module supports external antenna(I-PEX) option for user dedicated application.
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HF-LPB135 Series Low Power WiFi Module User Manual
Table5. HF-LPB135 External Antenna Parameters
1.2.5. Evaluation Kit
Figure 4. HF-LPB130 EVK
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
If user select external antenna, HF-LPB135 series Wi-Fi 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:
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-LPB135 series module with
the RS-232 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-LPB135 Series Low Power WiFi Module User Manual
Figure 5. HF-LPT230 EVK
Table6. HF-LPB135 Evaluation Kit Interface Description
1.2.6. Order Information
Function
Name
Description
External
Interface
RS232
Main data/command RS-232 interface, this
interface maximum baud rate is 460800. Can not
be used for debug UART log(It need 921600)
USB
USB to UART interface, can be used for debug
UART log
DC5V
DC jack for power in, 5～9V input.
LED
Power
Power LED
Ready
nReady LED
Link
nLink LED
Button
nReload
Smartlink and Restore factory default configuration.
See more for PIN Definition
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:
Base on customer detailed requirement, HF-LPB135 series modules provide different variants and
physical type for detailed application.
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HF-LPB135 Series Low Power WiFi Module User Manual
Figure 6. HF-LPB135 Order Information
1.2.7. Hardware Typical Application
Figure 7. HF-LPB135 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.
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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HF-LPB135 Series Low Power WiFi Module User Manual
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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