import machine
sdaPIN=machine.Pin(0)
sclPIN=machine.Pin(1)
i2c=machine.I2C(0,sda=sdaPIN, scl=sclPIN, freq=400000)
devices = i2c.scan()
if len(devices) == 0:
    print("No i2c device !")
else:
    print('i2c devices found:',len(devices))
for device in devices:
    print("Hexa address: ",hex(device))