Display current iTunes Track on LED display (max7219 or compatible Dot Matrix LED) connected to Raspberry PI/Arduino.

ledAlert.py

# -*- coding: utf-8 -*-
#!/usr/bin/env python
# server side script for Raspberry PI

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import re
import argparse
import time

# Luma.LED_Matrix drivers & library is © 2017 Richard Hull
# https://luma-led-matrix.readthedocs.io/en/latest/index.html
# https://github.com/rm-hull/luma.led_matrix

from luma.core.interface.serial import spi, noop
from luma.core.render import canvas
from luma.led_matrix.device import max7219
from luma.core.virtual import viewport
from luma.core.legacy import text, show_message
from luma.core.legacy.font import proportional, LCD_FONT
serial = spi(port=0, device=0, gpio=noop())

# Details regarding the block_orientation and cascaded options:
# https://luma-led-matrix.readthedocs.io/en/latest/python-usage.html#daisy-chaining

device = max7219(serial, cascaded=4, block_orientation=-90, rotate=0)

class S(BaseHTTPRequestHandler):
    def _set_headers(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()

    def do_POST(self):
        content_length = int(self.headers['Content-Length'])
        post_data = self.rfile.read(content_length)
        self._set_headers()
        show_message(device, post_data, fill="white", font=proportional(LCD_FONT))
		
def run(server_class=HTTPServer, handler_class=S, port=8181):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print 'Starting LED Alert...'
    httpd.serve_forever()

if __name__ == "__main__":
    from sys import argv
    if len(argv) == 2:
        run(port=int(argv[1]))
    else:
        run()

trackinfo.py

# -*- coding: utf-8 -*-
#!/usr/bin/env python
# run this on your Mac

import Foundation
from AppKit import *
from PyObjCTools import AppHelper
import requests

LED_URL = "http://raspberrypi.local:8181"

class GetSongs(NSObject):
    def getMySongs_(self, song):
        song_details = {}
        ui = song.userInfo()
        song_details = dict(zip(ui.keys(), ui.values()))
        playerState = (song_details['Player State'])
        if not('Stopped' in playerState):
            nowPlaying = song_details['Artist'] + ' : ' + song_details['Name']
        else:
            return     
        if('Playing' in playerState):
            r = requests.post(url = LED_URL, data = nowPlaying.encode('utf-8'))
        
nc = Foundation.NSDistributedNotificationCenter.defaultCenter()
GetSongs = GetSongs.new()
nc.addObserver_selector_name_object_(GetSongs, 'getMySongs:', 'com.apple.iTunes.playerInfo',None)
nc.addObserver_selector_name_object_(GetSongs, 'getMySongs:', 'com.spotify.client.PlaybackStateChanged',None)

AppHelper.runConsoleEventLoop()

The result: