Allow closing via mqtt

door_pi_control/__init__.py

@@ -1,9 +1,8 @@
 #!/usr/bin/python
-from . import nfc, socket, door, bell
+from . import nfc, socket, door, bell, mqtt
 from .util import init_logging
 
 from collections import namedtuple
-import paho.mqtt.client as mqcl
 import logging
 
 def main():
@@ -29,9 +28,7 @@ def main():
 
     config = parser.parse_args()
 
-    mqttc = mqcl.Client()
-    mqttc.connect_async(config.mqtt_host, keepalive=60)
-    mqttc.loop_start()
+    mqttc = mqtt.reconnecting_client(config.mqtt_host)
     
     log_host = None
     if config.log_host != None:

door_pi_control/door/control.py

@@ -22,9 +22,15 @@ class Control(util.Loggable):
         self._position_task: Thread = None
         self._control_task: Thread = None
 
+        def handle_target(client, userdata, msg):
+            self._logger().debug("Incoming MQTT message on %s: %s", msg.topic, msg.payload)
+            if msg.topic == "door/state/target" and msg.payload == b'closed':
+                self.close()
+
         self.target = mqtt.Value(mqtt_client, "door/state/target",
                                  persistent=True,
-                                 translate=state_names)
+                                 translate=state_names,
+                                 remote_update_callback = handle_target)
         self.state = mqtt.Value(mqtt_client, "door/state/value",
                                 persistent=True,
                                 translate=state_names)

door_pi_control/mqtt.py

@@ -19,7 +19,8 @@ class Value:
                      typing.Dict[Any, str],
                      typing.Callable]
                  = None,
-                 max_update: float = 0.1):
+                 max_update: float = 0.1,
+                 remote_update_callback = None):
         self.client = client
         self.topic = topic
         self.persistent = persistent
@@ -39,6 +40,10 @@ class Value:
         if start_value is not None:
             self.update(start_value)
 
+        if remote_update_callback is not None:
+            self.client.message_callback_add(self.topic, remote_update_callback)
+            self.client.subscribe(self.topic, 2)
+
     def update(self, value: Any, *,
                force: bool = False,
                no_update: bool = False) -> None:
@@ -73,6 +78,7 @@ class Value:
         return self.translate(self.value)
 
 def reconnecting_client(host: str, *, keepalive: int = 60):
+    _logger.debug("Creating MQTT client with keepalive interval %d", keepalive)
     client = Client()
     client.on_connect = lambda client, userdata, flags, rc: \
         _logger.debug("Connected to mqtt host")
@@ -80,5 +86,8 @@ def reconnecting_client(host: str, *, keepalive: int = 60):
         _logger.debug("Disconnected from mqtt host")
     client.enable_logger(_logger.getChild("paho"))
     client.connect_async(host, keepalive=keepalive)
+    def on_message(client, userdata, msg):
+        _logger.debug("Unmatched message on %s: %s", msg.topic, msg.payload)
+    client.on_message = on_message
     client.loop_start()
     return client