Serial UART to WiFi Modules with On-board Antenna

USR-WIFI232-A2 is an embedded 802.11 b/g/n wifi module.

  • 3.3V TTL Level
  • AP/STA/AP+STA
  • 32 simultaneous client connections to Soft AP interface
  • On-board antenna
General Details

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

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Function Structure of Serial UART WiFi Modules

WIFIA2 Function

Networking Mode of Serial UART WiFi Modules

1.AP Mode

WIFIA2 AP
2.STA Mode

WIFIA2-STA
3.AP+STA Mode

WIFIA2 APSTA

Image of Serial UART WiFi Modules

Programmable WiFi Modules

Parameter
Wireless Parameters
CertificationFCC/CE
Wireless Standard802.11 b/g/n
Frequency Range2.412GHz-2.484GHz
Transmit Power802.11b: +20dBm (Max.)
802.11g: +18dBm (Max.)
802.11n: +15dBm (Max.)
Configurable
Receive Sensitivity802.11b: -89dBm
802.11g: -81dBm
802.11n: -71dBm
AntennaInternal: on-board antenna
Hardware Parameter
Data InterfaceUART: 300bps~460800bps
Ethernet: 10Mbps/100Mpbs
GPIOs
Working Voltage3.3V (+/-5%)
Working CurrentAP: 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 TypeStation/AP mode
Security MechanismWEP/WPA-PSK/WPA2-PSK
Encryption TypeWEP64/WEP128/TKIP/AES
Work ModeTransparent transmission mode, serial command mode
Setting CommandAT+ instruction set
Network ProtocolTCP/UDP/ARP/ICMP/DHCP/DNS/HTTP
Max. Client Number in TCP Server Mode32
User ConfigurationWeb server+AT command config
Client Application SoftwareClients can customize application software
All USR products will be tested by R&D first, then production test again.(ESD Test,Surge/EFT Test, High/Low Temperature Test, EMC and LVD environment reliability test, etc.) Click here to watch test videos.
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USR products are exported to more than 100 countries and regions, get approvals like CE, FCC, ROHS, CCC, KC, IC, SRRC, etc.
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