$10.00 USD

USR-WIFI232-B2 are UART WiFi Modules, embedded serial to 802.11 b/g/n WiFi modules with external antennas. UART WiFi Modules USR-WIFI232-B2 connect traditional serial devices and MCU controlled devices with WiFi network to realize control and management. The module has 1 Ethernet port that can realize mutual data transmission among WiFi, serial and Ethernet.
Qty available: 300 SKU:USR-WIFI232-B2
Features of UART WiFi Modules USR-WIFI232-B2
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
External 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: 280 meters (open horizon, 3dbi antenna)

Application Field of UART WiFi Modules USR-WIFI232-B2
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 to WiFi Modules USR-WIFI232-B2
Function Structure of Serial to WiFi Modules USR-WIFI232-B

Networking Mode of Serial to WiFi Modules USR-WIFI232-B2
AP Mode

STA Mode


Image of Serial to WiFi Modules USR-WIFI232-B2 Images of Wifi Modules

Support PUSR Cloud

Hardware Dimensions

Wireless Parameters
Wireless Standard802.11 b/g/n
Frequency Range2.412GHz-2.484GHz
Transmit Power802.11b: +20dBm (Max.)
802.11g: +18dBm (Max.)
802.11n: +15dBm (Max.)
Receive Sensitivity802.11b: -89dBm
802.11g: -81dBm
802.11n: -71dBm
AntennaExternal: I-PEX connector
Hardware Parameter
Data InterfaceUART: 300bps~460800bps
Ethernet: 10Mbps/100Mpbs
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/https
Max. Client Number in TCP Server Mode32
User ConfigurationWeb server+AT command config
Client Application SoftwareClients can customize application software