For fun and learn, it uses a ESP8266 (NodeMCU) and a ProMini arduinos linked via I2C, the code for the ESP8266 is on the esp8266_wx_station repo
This is an early stage and design is evolving...
This project is a Platformio one, if you use arduino simply copy the files in the src folder and change the extensions to .ino and remove the #include <Arduino.h> on top of the main.cpp