Free shipping RS232 serial port uart to WIFI wireless server with two ethernet ports with p2p function remote control - AliExpress
1W RF Data Module Serial to wireless RS232, RS485 from Lensen--Wireless Communication on Tindie
Amazon.com: Mini RS232 to WiFi Adapter RS232 Wireless Extender Transparent Transmission Wifi-RS232 Adapter No Drive Telnet Protocol RS232 to WiFi Converter for Remote Config/Testing : Electronics
Bluetooth 3.0 RS232 Serial Adapter Nine-Wire System 10M Class2 for Wireless Data Transfer – Oz Robotics
Serial RS232 / RS422 / RS485 to WiFi Network Device Server ezTCP CSW-H – Envistia Mall
Net-WiFi MODBUS RTU to/MODBUS TCP (wireless), TCP/UDP to wireless
External antenna, Male DB9] WiFi RS-232 adapter, WiFi RS232 adapter, serial to WiFi converter | Taiwantrade
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PowMr Wifi Module - WIFI-VM – PowMr
USR-W610 Serial to WiFi Ethernet Wireless Converter RS232 RS485 Serial Server | eBay