1  # SPDX-FileCopyrightText: 2017 Limor Fried for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """CircuitPython Essentials I2C sensor example using TSL2591"""
 6  import time
 7  import board
 8  import adafruit_tsl2591
 9  
10  i2c = board.I2C()
11  
12  # Lock the I2C device before we try to scan
13  while not i2c.try_lock():
14      pass
15  # Print the addresses found once
16  print("I2C addresses found:", [hex(device_address) for device_address in i2c.scan()])
17  
18  # Unlock I2C now that we're done scanning.
19  i2c.unlock()
20  
21  # Create library object on our I2C port
22  tsl2591 = adafruit_tsl2591.TSL2591(i2c)
23  
24  # Use the object to print the sensor readings
25  while True:
26      print("Lux:", tsl2591.lux)
27      time.sleep(0.5)