UART to WIFI | Low Cost WIFI Modules

Low Cost WiFi Module

Model: USR-C210

USR-C210 is a Low Cost UART to wifi module, used for data transparent transmission.
  • SMD Type
  • 1 TTL Serial Ports Supporting Data Rates of up to 460.8Kbps
  • 3 simultaneous client connections to Soft AP interface
  • GPIO

UART to WIFI | Low Cost WIFI Modules

General Details

Introduction of low cost WiFi Modules

The low cost wifi modules, used for data transparent transmission. The hardware of USR-C210 wifi module integrates MAC, baseband chip and RF transceiver unit. USR-C210 supports WiFi protocol and TCP/IP protocol. Users can realize serial device networking via simple configuration.


Features of low cost WiFi Modules

Support Wi-Fi@2.4 GHz 802.11b/g/n wireless standards

Support WPA/WPA2 security mode.

Support work as AP,STA,AP+STA mode

The fully integrated serial to wifi TCP/UDP transmission function,can choose multiple serial speed

LAN search and wireless parameter setting function

Support TCP/UDP Client registration packet mechanism

Support Simplelink/usrlink rapid networking configuration

Httpd Client function

Support class RFC2217 automatic baud rate adaptive function

Support simple AT+ command set configuration

3.3V power supply

Ultra-low power

On-board PCB antenna and external antenna optional

Small size: 18.22 x 26.65 x 2.8 mm


Application Field of low cost 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


Networking Mode of low cost WiFi Modules

AP Mode
AP Networking Mode of WiFi Modules


STA Mode
STA Networking Mode of WiFi Modules


STA Networking Mode of WiFi Modules


Various parameter setting method

Software Settings
Download settings software, search WiFi Modules in the LAN through the serial port server IP, name, MAC address, or the version number. Then set the parameters you need, otherwise keep the default.


Web-page Settings

1.Open your browser and inter the default IP address of the WiFi Modules.

2.Open the login page of Serial Server, Enter the user name and password (default admin).

3.After setting parameter, Click “Save“ and “Restart“, then setting will take effect.


Serial AT commands Settings
User can set parameter by module itself without going through another computer to configure. This setting method is used in the following situation: user have to configure IP address and destination IP address on site. AT command can meet the demand. After MCU connects serial server module by TTL (UART), MCU can configure setting by AT command.


Wireless Parameters  
Wireless Standard 802.11 b/g/n
Transmit Power 802.11b: +18 +/-1dBm (@11Mbps)
802.11g: +17 +/-1dBm (@54Mbps)
802.11n: +15 +/-1dBm (@HT20, MCS7)
Receive Sensitivity 802.11b: -85 dBm (@11Mbps, CCK)
802.11g: -70 dBm (@54Mbps, OFDM)
802.11n: -68 dBm (@HT20, MCS7)
Antenna External: I-PEX connector
Internal: on-board antenna
Hardware Parameters  
Data Interface UART
Operating Voltage DC 3.0~3.6V
Operating Current AP: 74mA (average), 285mA (peak)
STA: 32mA (average), 196mA (peak)
Operating Temp. -20~ 85°C
Storage Temp. -55~ 125°C
Size 18.22 x 26.65 x 2.8 mm
External Interface SMT
Software Parameters  
Wireless Network Type AP, STA, AP+STA
Security Mechanism WPA-PSK/WPA2-PSK
Encryption Type TKIP, AES, TKIP/AES
Network Protocol IPv4, TCP/UDP
User Configuration AT+command
Webpage setting


How to Buy

Official Online ShopClick to order USR-C210
Alibaba Online ShopClick to order USR-C210
Contacts SalesYou can leave a message for our sales below.



C21 Series

TI C32 Series

High-performance Series








USR-C210-130 USR-C215 USR-C216 USR-C322 USR-WIFI232-B2











STA limits in AP mode

(Qty of TCP Client to access when it works as TCP server)




Size (mm)






Working Mode




Editable Web Page


Identity Packet

User Configuration

AT+command / Web page setting

Heartbeat Socket


RTS/CTS Flow Control


Ultra-low Power-Deep Sleep




Web socket






Customer ReviewWrite a Review

Displaying 1 to 5 (of 0 reviews)

Request a Quote

Request a quote or get more products/services/promotions. We will reply to you in a business day. (Your email address will not be shared with a third party.)