Description:
Small WIFI weather station based on the ESP8266 and SHT21 sensor.
The weather station is using MQTT protocol and send three simple topics : temperature/, humidity/, and voltage/ (for battery monitoring).
This code is tested on ESP-01 module only.
Thanks to :
israellot for esp-ginx which this project is based on (https://github.com/israellot/esp-ginx)
reaper7 for the sht21 sensor support (https://github.com/reaper7/esp8266_i2c_sht21)
zarya for pure software based i2c implementation (https://github.com/zarya/esp8266_i2c_driver)