examples/pi_busio_i2c.py

   1 import time
   2 import board
   3 import busio
   4
   5 print("hello blinka!")
   6
   7 i2c = busio.I2C(board.SCL, board.SDA)
   8
   9 print("I2C devices found: ", [hex(i) for i in i2c.scan()])
  10
  11 if not 0x18 in i2c.scan():
  12     print("Didn't find MCP9808")
  13     exit()
  14
  15 def temp_c(data):
  16     value = data[0] << 8 | data[1]
  17     temp = (value & 0xFFF) / 16.0
  18     if value & 0x1000:
  19         temp -= 256.0
  20     return temp
  21
  22 while True:
  23     i2c.writeto(0x18, bytes([0x05]), stop=False)
  24     result = bytearray(2)
  25     i2c.readfrom_into(0x18, result)
  26     print(temp_c(result))
  27     time.sleep(0.5)