- Raspberry code. Python. Pyrebase.
You need:
pi@raspberrypi:~ $ python3 -V
Python 3.7.3
pi@raspberrypi:~ $ pip --version
pip 18.1 from /usr/lib/python2.7/dist-packages/pip (python 2.7)
If you don't have pip, you can install it:
pi@raspberrypi:~ $ curl https://bootstrap.pypa.io/get-pip.py | python3
You also need "Pyrebase", to communicate Python with Firebase.
pi@raspberrypi:~ $ sudo pip 3 install Pyrebase
-
In Raspbian we have a text editor for Python.
-
Paste this code (Change apiKey, authDomain, databaseURL and storageBucket) :
# Juan A. Villalpando
# http://kio4.com/raspberry/9_firebasedb.htm
import RPi.GPIO as GPIO
import pyrebase
from time import sleep
config = {
"apiKey": "AIzaSyAo9cEmTy2pOEygEEIXdCUHc7uOlSFdcW4",
"authDomain": "kio4-3c240",
"databaseURL": "https://kio4-3c240.firebaseio.com/",
"storageBucket": "project-293607155139"
}
firebase = pyrebase.initialize_app(config)
LED22 = 22 # Terminal by number, el 22 es el GPIO25.
PushButton18 = 18 # Terminal by number, el 18 es el GPIO24.
# El otro terminal a GND.
GPIO.setmode(GPIO.BOARD) # Terminal by number.
GPIO.setwarnings(False)
GPIO.setup(LED22,GPIO.OUT)
GPIO.setup(PushButton18, GPIO.IN, pull_up_down=GPIO.PUD_UP)
print("Inicio. (CTRL + C para salir.")
try:
while True: # Bucle principal
database = firebase.database()
ProjectBucket = database.child("project-293607155139")
estadoLED22 = ProjectBucket.child("LED").get().val()
# print(estadoLED22)
if str(estadoLED22) == "\"OFF\"":
print("LED22 now is OFF.")
GPIO.output(LED22, GPIO.LOW)
else:
print("LED22 now is ON.")
GPIO.output(LED22, GPIO.HIGH)
if GPIO.input(PushButton18) == GPIO.HIGH:
print("PushButton not pressed.")
ProjectBucket.child("project-293607155139").child("PushButton").set("no_pressed.")
else:
print("PushButton pressed.")
ProjectBucket.child("project-293607155139").child("PushButton").set("PRESSED.")
except KeyboardInterrupt: # Salir con CTRL+C
print("Salida.")
GPIO.cleanup() # Limpiar GPIO
- Connections.
- This tutorial in Spanish:
Raspberry Pi. FireBaseDB. Encender/Apagar LED. Deslizadores. App Inventor. Android.