udpmatelight.py

#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-

import socket
import colorsys # for HSV-to-RGB-conversion

UDP_IP = "10.0.0.200"
UDP_PORT = 1337

ROWS = 16
COLS = 40
    
def send_array(data):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.sendto(data, (UDP_IP, UDP_PORT))

def prepare_message(data):
    """Prepares the pixel data for transmission over UDP
    """
    # 4 bytes for future use as a crc32 checksum in network byte order.
    checksum = bytearray([0,0,0,0])
    data_as_bytes = bytearray(data)
    message = data_as_bytes + checksum
    return message

def make_gradient(hue):
    """This creates a gradient for on hue value.
    """
    array = []
    num_pixels = ROWS * COLS
    step_size = 255.0 / float(num_pixels)
    for i in range(num_pixels):
        h = float(hue) / 360.0
        s = 1.0
        v = (i * step_size) / 255.0
        color = int(i * step_size)
        (r, g, b) = colorsys.hsv_to_rgb(h, s, v)
        array += [int(r * 255), int(g * 255), int(b * 255)]
    return array
    
def cycle_hue():
    """Cycles through all possible hue values and send it to the Mate 
    Light
    """
    for hue in range(360):
        data = make_gradient(hue)
        message = prepare_message(data)
        send_array(message)
    
if __name__ == '__main__':
    print "Transmitting (press Ctrl+C to abort) ..."
    try:
        while True:
            cycle_hue()
    except KeyboardInterrupt:
        print " Goodbye!"