Add logging to MQTT client and main application; create systemd service file

hasspy/mqtt.py

@@ -1,10 +1,13 @@
 import json
+import logging
 from subprocess import run
 from typing import Any, Mapping
 
 from paho.mqtt.client import Client, MQTTMessage, MQTTMessageInfo
 from paho.mqtt.enums import CallbackAPIVersion, MQTTErrorCode
 
+log = logging.getLogger(__name__)
+
 
 class HassClient(Client):
     def __init__(self, node_id: str, config: Mapping[str, Any]) -> None:
@@ -61,6 +64,7 @@ class HassClient(Client):
         )
 
     def on_connect(self, *args: Any, **kwargs: Any) -> None:
+        log.info("Connected to MQTT broker")
         self.publish_discovery()
         self.publish_availability()
         self.init_subs()
@@ -71,11 +75,11 @@ class HassClient(Client):
         payload = message.payload.decode("utf-8")
 
         if not self.power_on and payload == "POWER_ON":
-            print("Cancelling shutdown…")
+            log.info("Cancelling shutdown…")
             self.power_on = True
             run(["systemctl", "poweroff", "--when=cancel"])
         elif self.power_on and payload == "POWER_OFF":
-            print("Powering off…")
+            log.info("Powering off…")
             self.power_on = False
             run(["systemctl", "poweroff", "--when=+1m"])