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Introduction of  UART WiFi Modules

USR-WIFI232-D2b UART WiFi Modules with two ethernet port which need connect with external antenna. Embedded 802.11 b/g/n Wi-Fi modules supports serial to LAN/Wi-Fi, LAN to Wi-Fi or LAN to LAN transmission. The module can realize bidirectional transparent data transmission between COM and TCP/IP network


UART WiFi Modules USR-WIFI232-D2b


Industrial Solution


Ethernet Port

Two RJ45 Port, WIFI to Ethernet converter

High Performance

Working frequency 580Mhz, 2MB Flash

Built-in Webpage

Configure Parameters ,Web IO

httpsD Client

Sends serial data in https format to https server

TCP Server

Supports max 32 Client to be connected

Flow Control



Features of  UART WiFi Modules

Support IEEE802.11b/g/n wireless standards

Support TCP/IP/UDP network protocols

Support UART/GPIO/Ethernet data interface

Support work as STA/AP/AP+STA mode

Support router/bridge mode networking

Support external/internal antenna

Support transparent transmission mode

Support AT+ instruction set for configuration

Support friendly web configuration page

Support palmodic signal

Support UART auto-frame function

Single +3.3V power supply

Small Size: 32 x 45 x 8 mm

FCC/CE/RoHS/TELEC certificated


Application field of 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

Structure of UART WiFi Modules

Structure of UART WiFi Modules


Work Mode of UART WiFi Modules

Application of AP Mode

Application of AP Mode, UART WiFi Modules


Application of STA Mode

STA Mode of UART WiFi Modules


Application of AP+STA Mode

AP+STA Mode of UART WiFi Modules


Images of WiFi Modules with ethernet port

Images of WiFi Modules with ethernet port

Wireless Parameters  
Wireless Standard 802.11 b/g/n
Transmit Power 802.11b: +20dBm (Max.)
802.11g: +18dBm (Max.)
802.11n: +15dBm (Max.)
Receive Sensitivity 802.11b: -89 dBm
802.11g: -81dBm
802.11n: -71dBm
Frequency Range 2.412GHz-2.484GHz
Certification FCC/CE/ROHS/TELEC
Antenna External: I-PEX connector
Internal: on-board antenna
Hardware Parameters  
Data Interface UART: 300bps~460800bps
Ethernet: 100Mpbs
Operating Voltage 3.3V(+/-5%)
Operating Current AP: 226mA (average), 346mA (peak)
STA: 218mA (average), 320mA (peak)
Operating Temp. -40°C~ 85°C
Storage Temp. -40°C- 125°C
Size 32mm x 45mm x8mm
Software Parameters  
Wireless Network Type Station/AP Mode/AP+STA
Security Mechanism WEP/WPA-PSK/WPA2-PSK
Encryption Type WEP64/WEP128/TKIP/AES
Work Mode Transparent transmission, serial command
Setting Command AT+instruction set
Network Protocol TCP/UDP/ARP/ICMP/DHCP/DNS/https
Max. Client Number in TCP Server Mode 32
User Configuration Web Server+AT command config.


title update date operation
WiFi Device Under https Client Mode Manual 2020-May-Mon details>

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