CMPS12_compass_I2C.py

#!/usr/bin/env python3

# This code sample reads the current bearing of a CMPS12 Tilt-Compensated
# compass attached to the I2C interface on a Raspberry Pi.
# https://www.robot-electronics.co.uk/files/cmps12.pdf
# http://wiki.erazor-zone.de/wiki:linux:python:smbus:doc

# $ sudo apt-get install python3 python3-pip python-dev python-smbus
# $ sudo python3 -m pip install --upgrade pip setuptools wheel
# $ sudo pip3 install smbus
#!/usr/bin/env python3

#!/usr/bin/env python3

import smbus
import time
import statistics

bus = smbus.SMBus(1)

DEVICE_ADDRESS = 0x60
DEVICE_REG_BEARING = 0x01

values = []

while 1:
	try:
		bearing = bus.read_byte_data(DEVICE_ADDRESS, DEVICE_REG_BEARING)
		bearing = int((bearing / 255) * 360)
		values.append(bearing)
		if len(values) > 10:
			values.pop(0)
		print(statistics.mode(values))
		time.sleep(0.1)
	except:
		pass