ESP8266 WiFi Module Sent Sensor Data to Firebase Realtime Database
Hardware 1.ESP8266 WiFi Module ( We use ESP8266 12E ) 2.Temperature and Humidity Sensor DHTxx ( we use DHT22 or AM2302 ) 3.OLED Display for Option
Library Firebase Arduino Library WiFi Connector DHT Sensor Adafriut GFX ( OLED Display )
more info https://microcontrollerkits.blogspot.com/2016/12/esp8266-firebase.html