import machine

sdaPIN=machine.Pin(21)
sclPIN=machine.Pin(22)

i2c=machine.I2C(sda=sdaPIN, scl=sclPIN, freq=10000 )

devices = i2c.scan()
if len(devices) == 0:
    print("no i2c device found ")
else:
    print('i2c devices found:' , len(devices))
for device in devices:
    print("At address:" , hex(device))