Libraries:-
https://github.com/FirebaseExtended/f...
https://github.com/bblanchon/ArduinoJ...
How To Send Arduino/NodeMCU ESP8266 Sensor Data To Firebase Real Time Database:-
1. Download and install libraries
2. Create firebase real time databse and get secret key:- https://tricksumo.com/use-firebase-wi...
3. Upload code to nodeMCU after necessary changes:- https://gist.github.com/TrickSumo/b60...