WiFi UART communication
A wireless communication device use ESP8266.
Installation
Make sure you can use the ESP8266 with the Arduino IDE.
Download the WiFiManager liberary from https://github.com/tzapu/WiFiManager
In the Arduino IDE go to "Sketch" -> "Include Library" -> "Add .ZIP Library..." and select the file you just downloaded.
Then open and upload the file "WiFi_UART.ino" to ESP8266.
You maybe need a virtual serial port software on your computer. https://www.usr.cn/download/31.html