ESP8266 WiFi Configurator (EWC) is a free utility tool developed by Pozitifdenge Internet Hizmetleri. It allows users to configure their ESP8266 WiFi module with their Android device's USB port. However, it requires an OTG cable and a USB-RS232 converter to work.

With EWC, users can set the baud rate, send AT commands, check version information, list available access points, set the IP address of the ESP8266 station, obtain the IP address of the ESP8266 station, connect to an access point, and use WiFi commands such as CWMODE?, CWMODE=, CIPMODE?, CIPMODE=, CIPMUX?, and CIPMUX=. Additionally, users can show USB logs for send/receive data.

The program supports USB-RS232 converters with CP210X, CDC, FTDI, PL2303, and CH34x chips. Overall, ESP8266 WiFi Configurator (EWC) is a useful tool for those who need to configure their ESP8266 WiFi module with an Android device's USB port.