add mqtt_client.py with scene_recall + shutdown commands

mqtt_client.py

@@ -0,0 +1,54 @@
+#!/bin/python
+
+import argparse
+import json
+
+import paho.mqtt.client as mqtt
+import mixer
+from mixer import Mixer
+
+MQTT_SERVER_ADDRESS = "localhost"
+MQTT_SERVER_PORT = 1883
+MQTT_TOPIC = "homeassistant/device/mixer"
+
+m: Mixer = None
+
+
+def on_connect(client, userdata, flags, reason_code, properties):
+    print(f"Connected: {reason_code}")
+    client.subscribe("#")
+
+
+def on_message(client, userdata, msg):
+    payload = msg.payload.decode()
+
+    print(f"{msg.topic}: {payload}")
+
+    j = json.loads(payload)
+
+    match j["command"]:
+        case "scene_recall":
+            m.scene_recall(j["args"]["scene_id"])
+        case "shutdown":
+            m.shutdown()
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Allen & Heath Qu MQTT Remote Control")
+    parser.add_argument("ip", help="IP of the mixer")
+    args = parser.parse_args()
+    print(f"IP: {args.ip}")
+
+    global m
+    m = mixer.Mixer(args.ip, mixer.MIXER_PORT)
+
+    client = mqtt.Client(callback_api_version=mqtt.CallbackAPIVersion.VERSION2)
+    client.on_connect = on_connect
+    client.on_message = on_message
+
+    client.connect(MQTT_SERVER_ADDRESS, MQTT_SERVER_PORT, 60)
+    client.loop_forever()
+
+
+if __name__ == "__main__":
+    main()