""" MicroPython I2C scanner
    Retorna l'adreça (en decimal i hexa) de tots els dispositius connectats al bus i2c
    https://gist.github.com/projetsdiy/f4330be62589ab9b3da1a4eacc6b6b1c """

import machine
i2c = machine.I2C(0, scl=machine.Pin(22), sda=machine.Pin(21))  # pins I2C de l'ESP32

print ('Scan i2c bus...')
devices = i2c.scan()

if len(devices) == 0:    # lens() retorna el nombre d'elements d'un objecte
  print("No i2c device !")
else:
  print('i2c devices found:',len(devices))

  for device in devices:  
    print("Decimal address: ",device," | Hexa address: ",hex(device))

print()