You could request web site links ( http request) from the arduino.And in this request you can pass data to the database.This is how the data is stored to the database from Arduino.
I am bit back about firebase database.
But let me tell what we did for storing data to a normal database.We made a PHP script such that if its link is requested with data ,it would store the data to the database.Then we made Arduino code in such a way as to request that link each time with the corresponding value to be stored.So if you can do PHP scripting for firebase data entry then its easier ( just request that link from Arduino).I think PHP insertion to firebase database is available.
You could request web site links ( http request) from the arduino.And in this request you can pass details to the database.This is how the data is stored to the database from Arduino.
I am bit back about firebase database.
But let me tell what we did for storing data to a normal database.We made a PHP script such that if its link is requested with data ,it would store the data to the database.Then we made Arduino code in such a way as to request that link each time with the corresponding value to be stored.So if you can do PHP scripting for firebase data entry then its easier ( just request that link from Arduino).I think PHP insertion to firebase database is available.
You can also pass data to a website too using the above method ( simple modification in url would do that ,pass data to be stored).But the problem is how you would store it to the database from that webpage.If you have a way for that you can try it too.
