forked from michaelarnauts/cec-mqtt-bridge
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bridge.py
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bridge.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import paho.mqtt.client as mqtt
import subprocess
import time
import re
import configparser as ConfigParser
import threading
import os
# Default configuration
config = {
'mqtt': {
'broker': 'localhost',
'devicename': 'cec-ir-mqtt',
'port': 1883,
'prefix': 'media',
'user': os.environ.get('MQTT_USER'),
'password': os.environ.get('MQTT_PASSWORD'),
'tls': 0,
},
'cec': {
'enabled': 0,
'id': 1,
'port': 'RPI',
'devices': '0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15',
},
'ir': {
'enabled': 0,
'sleep': 0.2,
}
}
def mqtt_on_connect(client, userdata, flags, rc):
"""@type client: paho.mqtt.client """
print("Connection returned result: " + str(rc))
# Subscribe to CEC commands
if int(config['cec']['enabled']) == 1:
client.subscribe([
(config['mqtt']['prefix'] + '/cec/cmd', 0),
(config['mqtt']['prefix'] + '/cec/+/cmd', 0),
(config['mqtt']['prefix'] + '/cec/+/set', 0),
(config['mqtt']['prefix'] + '/cec/tx', 0)
])
# Subscribe to IR commands
if int(config['ir']['enabled']) == 1:
client.subscribe([
(config['mqtt']['prefix'] + '/ir/+/tx', 0)
])
# Publish birth message
client.publish(config['mqtt']['prefix'] + '/bridge/status', 'online', qos=1, retain=True)
def mqtt_on_message(client, userdata, message):
"""@type client: paho.mqtt.client """
try:
# Decode topic
cmd = message.topic.replace(config['mqtt']['prefix'], '').strip('/')
print("Command received: %s (%s)" % (cmd, message.payload))
split = cmd.split('/')
if split[0] == 'cec':
if split[1] == 'cmd':
action = message.payload.decode()
if action == 'mute':
cec_client.AudioMute()
cec_send('71', id=5)
return
if action == 'unmute':
cec_client.AudioUnmute()
cec_send('71', id=5)
return
if action == 'voldown':
cec_client.VolumeDown()
cec_send('71', id=5)
return
if action == 'volup':
cec_client.VolumeUp()
cec_send('71', id=5)
return
raise Exception("Unknown command (%s)" % action)
if split[1] == 'tx':
commands = message.payload.decode().split(',')
for command in commands:
print(" Sending raw: %s" % command)
cec_send(command)
return
if split[2] == 'set':
if split[1] == 'volume':
action = int(message.payload.decode())
if action >= 0 and action <= 100:
volume = cec_volume()
# Attempt to set the correct volume, but try to avoid a never-ending loop due to rounding issues
attempts = 0
while volume != action and attempts <= 10:
diff = abs(volume - action)
# Run a bulk of vol up/down actions to close a large gap at first (inaccurate, but quick)
if diff >= 10:
for _ in range(round(diff / 2.5)):
if volume < action:
cec_client.VolumeUp()
else:
cec_client.VolumeDown()
# Set the volume precisely after the bulk operations, try to avoid an endless loop due to rounding
else:
if volume < action:
cec_client.VolumeUp()
else:
cec_client.VolumeDown()
# Refresh the volume levels and wait for the value to return before each loop
cec_send('71', id=5)
time.sleep(.2)
volume = cec_volume()
attempts += 1
return
raise Exception("Unknown command (%s)" % action)
if split[2] == 'cmd':
action = message.payload.decode()
if action == 'on':
id = int(split[1])
cec_send('44:6D', id=id)
mqtt_send(config['mqtt']['prefix'] + '/cec/' + str(id), 'on', True)
return
if action == 'off':
id = int(split[1])
cec_send('36', id=id)
mqtt_send(config['mqtt']['prefix'] + '/cec/' + str(id), 'off', True)
return
raise Exception("Unknown command (%s)" % action)
if split[0] == 'ir':
if split[2] == 'tx':
remote = split[1]
key = message.payload.decode()
ir_send(remote, key)
return
except Exception as e:
print("Error during processing of message: ", message.topic, message.payload, str(e))
def mqtt_send(topic, value, retain=False):
mqtt_client.publish(topic, value, retain=retain)
def cec_on_message(level, time, message):
if level == cec.CEC_LOG_TRAFFIC:
# Send raw command to mqtt
m = re.search('>> ([0-9a-f:]+)', message)
if m:
mqtt_send(config['mqtt']['prefix'] + '/cec/rx', m.group(1))
# Report Power Status
m = re.search('>> ([0-9a-f])[0-9a-f]:90:([0-9a-f]{2})', message)
if m:
id = int(m.group(1), 16)
# power = cec_client.PowerStatusToString(int(m.group(2)))
if (m.group(2) == '00') or (m.group(2) == '02'):
power = 'on'
else:
power = 'off'
mqtt_send(config['mqtt']['prefix'] + '/cec/' + str(id), power, True)
return
# Device Vendor ID
m = re.search('>> ([0-9a-f])[0-9a-f]:87', message)
if m:
id = int(m.group(1), 16)
power = 'on'
mqtt_send(config['mqtt']['prefix'] + '/cec/' + str(id), power, True)
return
# Report Physical Address
m = re.search('>> ([0-9a-f])[0-9a-f]:84', message)
if m:
id = int(m.group(1), 16)
power = 'on'
mqtt_send(config['mqtt']['prefix'] + '/cec/' + str(id), power, True)
return
# Report Audio Status
m = re.search('>> ([0-9a-f])[0-9a-f]:7a:([0-9a-f]{2})', message)
if m:
volume = None
mute = None
audio_status = int(m.group(2), 16)
if audio_status <= 100:
volume = audio_status
mute = 'off'
elif audio_status >= 128:
volume = audio_status - 128
mute = 'on'
if isinstance(volume, int):
mqtt_send(config['mqtt']['prefix'] + '/cec/volume', volume, True)
if mute:
mqtt_send(config['mqtt']['prefix'] + '/cec/mute', mute, True)
return
def cec_volume():
audio_status = cec_client.AudioStatus()
if audio_status <= 100:
return audio_status
elif audio_status >= 128:
return audio_status - 128
def cec_send(cmd, id=None):
if id is None:
cec_client.Transmit(cec_client.CommandFromString(cmd))
else:
cec_client.Transmit(cec_client.CommandFromString('1%s:%s' % (hex(id)[2:], cmd)))
def ir_listen_thread():
try:
sleep_time = float(config['ir']['sleep'])
while True:
try:
code = lirc.nextcode()
except lirc.NextCodeError:
code = None
if code:
code = code[0].split(",", maxsplit=1)
if len(code) == 1:
mqtt_send(config['mqtt']['prefix'] + '/ir/rx', code[0].strip())
elif len(code) == 2:
remote = code[0].strip()
code = code[1].strip()
mqtt_send(config['mqtt']['prefix'] + '/ir/' + remote + '/rx', code)
else:
time.sleep(sleep_time)
except:
return
def ir_send(remote, key):
subprocess.call(["irsend", "SEND_ONCE", remote, key])
def cec_refresh():
try:
for id in config['cec']['devices'].split(','):
cec_send('8F', id=int(id))
cec_send('71', id=5)
except Exception as e:
print("Error during refreshing: ", str(e))
def cleanup():
mqtt_client.loop_stop()
mqtt_client.publish(config['mqtt']['prefix'] + '/bridge/status', 'offline', qos=1, retain=True)
mqtt_client.disconnect()
if int(config['ir']['enabled']) == 1:
lirc.deinit()
try:
### Parse config ###
try:
Config = ConfigParser.SafeConfigParser()
if Config.read("config.ini"):
# Load all sections and overwrite default configuration
for section in Config.sections():
config[section].update(dict(Config.items(section)))
# Environment variables
for section in config:
for key, value in config[section].items():
env = os.getenv(section.upper() + '_' + key.upper());
if env:
config[section][key] = type(value)(env)
# Do some checks
if (not int(config['cec']['enabled']) == 1) and \
(not int(config['ir']['enabled']) == 1):
raise Exception('IR and CEC are both disabled. Can\'t continue.')
except Exception as e:
print("ERROR: Could not configure:", str(e))
exit(1)
### Setup CEC ###
if int(config['cec']['enabled']) == 1:
print("Initialising CEC...")
try:
import cec
cec_config = cec.libcec_configuration()
cec_config.strDeviceName = "cec-ir-mqtt"
cec_config.bActivateSource = 0
cec_config.deviceTypes.Add(cec.CEC_DEVICE_TYPE_RECORDING_DEVICE)
cec_config.clientVersion = cec.LIBCEC_VERSION_CURRENT
cec_config.SetLogCallback(cec_on_message)
cec_client = cec.ICECAdapter.Create(cec_config)
if not cec_client.Open(config['cec']['port']):
raise Exception("Could not connect to cec adapter")
except Exception as e:
print("ERROR: Could not initialise CEC:", str(e))
exit(1)
### Setup IR ###
if int(config['ir']['enabled']) == 1:
print("Initialising IR...")
try:
import lirc
lirc.init("cec-ir-mqtt", "lircrc", blocking=False)
lirc_thread = threading.Thread(target=ir_listen_thread)
lirc_thread.start()
except Exception as e:
print("ERROR: Could not initialise IR:", str(e))
exit(1)
### Setup MQTT ###
print("Initialising MQTT...")
mqtt_client = mqtt.Client(config['mqtt']['devicename'])
mqtt_client.on_connect = mqtt_on_connect
mqtt_client.on_message = mqtt_on_message
if config['mqtt']['user']:
mqtt_client.username_pw_set(config['mqtt']['user'], password=config['mqtt']['password']);
if int(config['mqtt']['tls']) == 1:
mqtt_client.tls_set();
mqtt_client.will_set(config['mqtt']['prefix'] + '/bridge/status', 'offline', qos=1, retain=True)
mqtt_client.connect(config['mqtt']['broker'], int(config['mqtt']['port']), 60)
mqtt_client.loop_start()
print("Starting main loop...")
while True:
if int(config['cec']['enabled']) == 1:
cec_refresh()
time.sleep(10)
except KeyboardInterrupt:
cleanup()
except RuntimeError:
cleanup()