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Serial WiFi Adapter - RS232 - Mini

  • Model: USCEW10
  • In Stock


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The USCEW10 is a small but powerful serial RS232 to Wi-Fi converter with all basic features packed in a small reliable package. It features an RDA5981 processor with integrated ARM Cortex-M4 core, 160MHz and Mbed operating system.

Use it for connecting a standard RS232 serial device to your computer over WiFi. It can be connected either by using a wireless router in an existing network or by connecting directly through an access point.
It supports standard protocols IP,TCP server/client,UDP server/client,DHCP,DNS,HTTP Server/Client, Web socket, Telnetd, NTP, MQTT and even Modbus TCP.

Measuring only 61 x 26 x 17.8 mm this serial to Wi-Fi converter is ideal for integrating into existing systems, small enclosures with limited space or simply if you just like a small convenient converter. The converter has an internal PCB antenna. The housing is made of ABS plastic. It is not water or dust proof or so it is mainly suitable for warehouse, office, light commercial and industrial environments.

Included with the converter is a 8-pin screw terminal header which can be used for connecting RS232 wires, for powering the converter and for resetting the converter.
Optional accessories includes an interface cable for easy interfacing with the converter and a mounting bracket for securing the converter with screws. We highly recommend using the interface cable for easier interfacing with the converter. The cable consists of a DB9 connector, a DC power jack, screw terminals and a reset button. The cable connects to the converter through a standard RJ45 connector.

We recommend configuring the converter's parameters over Wi-Fi using a web-browser since this is the fastest and easiest way.

Power for the converter must be supplied through the included screw terminal header or the optional interface cable with a DC jack. The supply voltage is 5 - 18VDC. A standard 110VAC/5VDC power supply can be used as a power source.

A note regarding flow control, this converter supports software flow control (XON/XOFF) only, it does NOT support hardware flow control (CTS/RTS).

serial wifi setup example

Overall features
  • Basic and reliable serial RS232 to WiFi adapter
  • Small footprint
  • Modbus TCP/RTU and Telnetd support
  • Easy to setup and use
  • Reliable Mbed operating system
  • Supports None, TLS, AES, DES3
  • Voltage: 5 - 18VDC
  • Supports AP and STA network modes
  • Works with most mobile devices / operating systems
  • PCB antenna

Useful optional accessories
(not included)

Null modem adapter
Null modem adapter

DB9 to RJ45 adapter
DB9 - RJ45 adapter

DB9 gender changer
Gender Changer

5V power supply
5V Power supply
System Information
Part number USCEW10
Processor RDA5981 with ARM Cortex-M4 core, 160MHz, Mbed OS.
Flash/SDRAM 2MB/352KB
Operating System Virtual COM software available for Windows 11, 10, 8.1 / 8, 7, Vista (32/64-bit)
Wi-Fi Interface
Standard 802.11 b/g/n
Frequency 2.412GHz-2.484GHz
Network Protocol IP,TCP server/client,UDP server/client,DHCP,DNS,HTTP Server/Client, Web socket, Telnetd, NTP, MQTT, Modbus TCP
Network types AP, STA, AP+STA
Number of network TCP sockets max 5
Encryption None, TLS, AES, DES3
Tx Power 802.11b: +18dBm (Max.)
802.11g: +16dBm (Max.)
802.11n: +15dBm (Max.)
Rx Sensitive 802.11b: -89dBm
802.11g: -81dBm
802.11n: -71dBm
Antenna Internal PCB
Serial Port
Ports 1 x RS232
Data Bits 7,8
Stop Bit 1,2
Check Bit None, Even, Odd
Baud Rate 300 bps - 230400 bps
Buffer size Max 1400 bytes
Flow Control No Flow Control
Software Xon/ Xoff flow control
(Hardware RTS/CTS NOT supported)
Parameter configuration Web-browser
Software utility
Basic Parameters
Size 61 x 26 x 17.8 mm
Operating Temp. -40 - 85°C
Storage Temp. -45 - 105°C, 5 - 95% RH (no condensation)
Input Voltage 5-18VDC
Working Current -200mA
Power <700mW
Other Information  
Certifications FCC/CE/SRRC/RoHS


For alternative RS232 wireless solutions please see our full selection of wireless serial converters.


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