Using Python serial library, we read the sensor values and send to Firebase using Pyrebase third party library.

Step 1: Setting Serial Parameters

To read the sensors values with serial communication we need to import a Python library called "serial":

import serial

ser = serial.Serial('/dev/ttyUSB') is the port that serial is connected;

ser.baudrate = 115200 is the serial baudrate of serial;

Step 2: Setting Firebase Database Parameters

To make communication with Firebase we need to install a third party library called "Pyrebase".

To do this we will execute the follow terminal command:

pip install pyrebase (before this, you need to install the pip "python get-pip.py").

After this import the library (import Pyrebase).

Now the parameters will be set:

config = {

"apiKey": "AIzaSyBlHBEbRzYL5IOHc9Yqkn-2XlxHe1R947Q",

"authDomain": "imaca2-36859.firebaseapp.com",

"databaseURL": "https://imaca2-36859.firebaseio.com",

"storageBucket": "imaca2-36859.appspot.com"

}

These parameters you will obtain in your Firebase database.

Next you create firebase variables:

firebase = pyrebase.initialize_app(config)

db = firebase.database()

The following code reads a serial line:

var = serial.readline()

To format and convert to float the next two lines are executed:

var = var.replace('\0', '')

var = float(var)

Now we send the value to our database:

db.update({"key": var})

After all we will finish the serial communication:

ser.close()