Enable / disable implemented

example_config/config.py

@@ -9,6 +9,8 @@ MQTT_USER = "user"
 MQTT_PASS = "pass"
 MQTT_SERVER = "host"
 
+ENABLED_TOPIC = 'topic'
+
 EXEC_LIST = {
     'topic_1': {
         'key': 'key',                   # Give a key or None to compare plain DATA

exec_command.py

@@ -24,12 +24,24 @@ bell_log.addHandler(my_handler)
 
 class exec_command(mqtt.mqtt_client):
     def __init__(self):
-        self.__block_execution__ = False
+        self.__enabled__ = True
         mqtt.mqtt_client.__init__(self, config.APP_NAME, config.MQTT_SERVER, 1883, config.MQTT_USER, config.MQTT_PASS)
+        self.add_callback(config.ENABLED_TOPIC + '/set', self.set_enabled)
         for topic in config.EXEC_LIST:
             self.add_callback(topic, self.mqtt_rx)
         # Start a pseudo process
         self.process = subprocess.Popen(["sleep", "0"])
+        self.publish_states()
+
+    def set_enabled(self, client, userdata, message):
+        try:
+            payload = json.loads(message.payload)
+        except:
+            logger.exception("Error decoding json mqtt message")
+        else:
+            if self.__enabled__ != payload:
+                self.__enabled__ = payload
+                self.publish_states()
 
     def exec_command(self, cmd, message):
         self.process = subprocess.Popen(cmd.split(" "))
@@ -56,10 +68,16 @@ class exec_command(mqtt.mqtt_client):
                 except AttributeError:
                     logger.exception("payload seems to be no dictionary")
         if data is None or payload == data:
-            if self.process.poll() is None:
-                self.process.kill()
-            logger.debug("Starting execution in background...")
-            self.exec_command(config.EXEC_LIST[message.topic]['command'], message)
+            if self.__enabled__:
+                if self.process.poll() is None:
+                    self.process.kill()
+                logger.debug("Starting execution in background...")
+                self.exec_command(config.EXEC_LIST[message.topic]['command'], message)
+            else:
+                logger.info("Execution is disabled")
+
+    def publish_states(self):
+        self.send(config.ENABLED_TOPIC, json.dumps(self.__enabled__))
 
 
 if __name__ == '__main__': 
@@ -69,6 +87,7 @@ if __name__ == '__main__':
     #
     while True:
         time.sleep(30)
+        ec.publish_states()
     try:
         ec.join()
     finally: