UDP_RGB.py

import smbus
import time
bus = smbus.SMBus(1)

def readRGB():
	# I2C address 0x29
	# Register 0x12 has device ver. 
	# Register addresses must be OR'ed with 0x80
	bus.write_byte(0x29,0x80|0x12)
	ver = bus.read_byte(0x29)
	# version # should be 0x44
	if ver == 0x44:
		print "Device found\n"
		bus.write_byte(0x29, 0x80|0x00) # 0x00 = ENABLE register
	 	bus.write_byte(0x29, 0x01|0x02) # 0x01 = Power on, 0x02 RGB sensors enabled
 		bus.write_byte(0x29, 0x80|0x14) # Reading results start register 14, LSB then MSB
 
		while True:
  			data = bus.read_i2c_block_data(0x29, 0)
			clear = clear = data[1] << 8 | data[0]
			red = data[3] << 8 | data[2]
		  	green = data[5] << 8 | data[4]
			blue = data[7] << 8 | data[6]
		  	crgb = "C: %s, R: %s, G: %s, B: %s\n" % (clear, red, green, blue)
			print crgb
		  	time.sleep(1)
	else: 
		 print "Device not found\n"