Sample I2C – Device Scan - renesas/micropython GitHub Wiki

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  • Scan I2C bus and list connected devices.

  • Example for RA4M1 Clicker: Connect scl(P205), sda(P206), VCC and GND

import machine

i2c = machine.I2C(scl=machine.Pin.cpu.P205, sda=machine.Pin.cpu.P206)

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

if len(devices) == 0:
  print("No i2c device !")
else:
  print('i2c devices found: ', len(devices))

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

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  • Example for EK-RA6M2: Connect scl(P100), sda(P206), VCC and GND
import machine

i2c = machine.I2C(scl=machine.Pin.cpu.P205, sda=machine.Pin.cpu.P206)

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

if len(devices) == 0:
  print("No i2c device !")
else:
  print('i2c devices found: ', len(devices))

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

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  • Other pin can be used because this feature is supported by software I2C.