1  # SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """CircuitPython I2C Device Address Scan"""
 6  # If you run this and it seems to hang, try manually unlocking
 7  # your I2C bus from the REPL with
 8  #  >>> import board
 9  #  >>> board.I2C().unlock()
10  
11  import time
12  import board
13  
14  # To use default I2C bus (most boards)
15  i2c = board.I2C()
16  
17  # To create I2C bus on specific pins
18  # import busio
19  # i2c = busio.I2C(board.SCL1, board.SDA1)  # QT Py RP2040 STEMMA connector
20  # i2c = busio.I2C(board.GP1, board.GP0)    # Pi Pico RP2040
21  
22  while not i2c.try_lock():
23      pass
24  
25  try:
26      while True:
27          print(
28              "I2C addresses found:",
29              [hex(device_address) for device_address in i2c.scan()],
30          )
31          time.sleep(2)
32  
33  finally:  # unlock the i2c bus when ctrl-c'ing out of the loop
34      i2c.unlock()