Squeezebox/LMS send CEC command when play starts

lms-cec.py

#!/usr/bin/env python
from __future__ import print_function
from future.standard_library import install_aliases
install_aliases()
from urllib.parse import unquote
import select, socket
import cec

config = {
    'lms_server': ('192.168.1.10', 9090), # IP of your Squeeze Server, and the network control port (usually 9090)
    'player_mac': '00:00:00:00:00:00',  # the MAC address of your squeezebox (or fake MAC if using squeezelite)
    'cec_output': 5,  # the device which we will switch on, and set the input to cec_input
    'cec_input': 1    # the device which will play (e.g. the raspberry pi) this probably changes vendor to vendor, play around with it
    'default_volume': 80,  # the volume set on the squeezebox. If set, the volume will always revert to this and
                           # HDMI will be used for volume. If not set, will use squeezebox vol instead of HDMI

}

#TODO - option to use JSON RPC?

def connect(server=None):
    if not server:
        global config
        server = config['lms_server']
    conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    conn.connect((server[0], server[1]))
    conn.sendall(b'subscribe playlist,mixer\n')
    return conn

conn = connect()

cec.init()
cec.list_devices()  # necessary for volume to work

while True:
    try:
        ready_to_read, ready_to_write, in_error = \
            select.select([conn,], [conn,], [], 5)
    except select.error:
        conn.shutdown(2)    # 0 = done receiving, 1 = done sending, 2 = both
        conn.close()
        # connection error event here, maybe reconnect
        print('connection error, retrying')
        conn = connect()
    if len(ready_to_read) > 0:
        recv = conn.recv(2048)
        command = unquote(recv.decode().strip()).split()
        print(command)
        if command[0] == config['player_mac'] and command[1] == 'playlist':
            if command[2] == 'play' or (command[2] == 'pause' and command[3] == '0'):
                print("play command received")
                receiver = cec.Device(config['cec_output'])
                if not receiver.is_on():
                    if receiver.power_on():
                        print("turned receiver on")
                    else:
                        print("couldn't turn receiver on")
                if receiver.set_av_input(config['cec_input']):
                    print("set input on receiver")
                else:
                    print("couldn't set input on receiver")
        if 'default_volume' in config:
            if command[0] == config['player_mac'] and command[1] == 'mixer' and command[2] == 'volume':
                if command[3][0] == '+':
                    print ("volume up")
                    conn.sendall(b'%s mixer volume %s\n' % (config['player_mac'], config['default_volume']))
                    cec.volume_up()
                elif command[3][0] == '-':
                    print ("volume down")
                    conn.sendall(b'%s mixer volume %s\n' % (config['player_mac'], config['default_volume']))
                    cec.volume_down()

Well done! The script is working well on my raspberry pi. I´m able to turn on my av-receiver via hdmi-cec. Turning off the receiver doesn't seem to work. Could you also let the script turn off a receiver? The possibility to adjust the volume would also be great...

Changed subscribe to playlist rather than play, as subscribing to play seems to have stopped working.

Also added volume control - this will control the volume twice (once at squeezebox, once at the amp). comment out these if you want