USR-WIFI232-A2 Programmable WiFi Module, On-board Antenna

USR-WIFI232-A2 is an embedded Programmable WiFi Module, On-board Antenna, 802.11 b/g/n

  • 3.3V TTL Level
  • 32 simultaneous client connections to Soft AP interface
  • On-board antenna

Introduction of Serial UART WiFi Modules

USR-WIFI232-A2 is an embedded 802.11 b/g/n wifi module. It can convert UART(3.3V TTL) to WiFi or Ethernet. Module support AP(access point) mode and STA (WiFi client) mode. User can use this embedded module to realize their WiFi application speedy.

Features of Serial UART WiFi Modules

  • Support 802.11b/g/n wireless standard
  • Support TCP/IP/UDP network protocol
  • Support UART/GPIO/Ethernet data interface
  • Support work as STA/AP/AP+STA mode
  • Support router and bridge mode
  • Internal antenna
  • Support transparent transmission mode
  • Provide AT+ instruction set for configuration
  • Provide friendly web configuration page
  • Support heartbeat signal and wifi connection indication
  • Support UART auto-frame function
  • 3.3V power supply
  • Max transmission distance: 200 meters (open horizon)

Application Field of Serial UART WiFi Modules

  • WiFi remote control and monitoring, TCP/IP and WiFi coprocessor
  • WiFi remote control toy such as aircraft and cars
  • WiFi Internet radio, camera, digital photo frame
  • Medical instrument, data acquisition, handheld device
  • WiFi fatness testing machine, smart card terminal, Smart Home
  • Instrument, equipment parameter monitoring, wireless POS machine
  • Modern agriculture, military field and other wireless related secondary development applications

Function Chart of Serial UART WiFi Modules

Function Structure of Serial UART WiFi Modules

Networking Mode of Serial UART WiFi Modules

AP Mode

STA Mode

AP + STA Mode

Image of Serial UART WiFi Module


Wireless Parameters
Certification FCC/CE
Wireless Standard 802.11 b/g/n
Frequency Range 2.412GHz-2.484GHz
Transmit Power 802.11b: +20dBm (Max.)
802.11g: +18dBm (Max.)
802.11n: +15dBm (Max.)
Antenna Internal: on-board antenna
Hardware Parameter#colspan#
Data Interface UART: 300bps~460800bps
Ethernet: 10Mbps/100Mpbs
Working Voltage 3.3V (+/-5%)
Working Current AP: 169mA (average), 305mA (peak)
STA: 164mA (average), 197mA (peak)
Working Temp. -40°C ~ 85°C
Storage Temp. -40°C- 125°C
Size25mm x 40mm x8mm
Software Parameter
Wireless Network Type Station/AP mode
Security Mechanism WEP/WPA-PSK/WPA2-PSK
Encryption Type WEP64/WEP128/TKIP/AES
Work Mode Transparent transmission mode, serial command mode
Setting Command AT+ instruction set
Max. Client Number in TCP Server Mode 32
User Configuration Web server+AT command config
Client Application Software Clients can customize application software

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