Serial UART TTL Wifi Module with External Antenna

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Serial UART TTL Wifi Module with External Antenna
Serial UART TTL Wifi Module with External Antenna
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Price: $10.00
Availability: In Stock
Model: USR-WIFI232-B2
Manufacturer: USR IOT
Average Rating: Not Rated

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Introduction of UART WiFi Modules USR-WIFI232-B2

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.


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-B2

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

AP Mode


STA Mode


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.)
Receive Sensitivity 802.11b: -89dBm
802.11g: -81dBm
802.11n: -71dBm
Antenna External: I-PEX connector
Hardware Parameter  
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
Size 25mm 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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