Added home assistant mqtt interface

requirements.txt

@@ -1,2 +1,5 @@
 smbus2
 vl53l1x
+
+# For Home Assistant MQTT Sensor
+paho-mqtt

src/homeassistantcounter.py

@@ -0,0 +1,31 @@
+from peoplecounter import PeopleCounter
+from sensor.vl53l1xsensor import VL53L1XSensor
+import paho.mqtt.client as mqtt
+
+
+HA_URL = ""
+HA_PORT = 1883
+HA_TOPIC = ""
+
+
+# Setup connection to HA
+mqttClient = mqtt.Client()
+mqttClient.connect(HA_URL, HA_PORT)
+mqttClient.loop_start()  # Keep conneciton alive
+
+
+def countChange(change: int) -> None:
+    """Called when people count change is detected.
+    Sends update to the initialized HA instance.
+
+    Args:
+        change (int): Number of people leaving (<0) or entering (>0) a room.
+    """
+    # Send update to HA
+    mqttClient.publish(HA_TOPIC, change)
+
+
+# Setup people count sensor
+counter = PeopleCounter(VL53L1XSensor())
+counter.hookCounting(countChange)
+counter.run()