Telemetry

cloud/APIs/mqtt.py

@@ -0,0 +1,36 @@
+import json
+import os
+import paho.mqtt.publish as publish
+import sys
+
+# Retrieve broker parameters from shared config or environment variables
+MQTT_HOST = os.getenv("MQTT_HOST", "localhost")
+MQTT_PORT = int(os.getenv("MQTT_PORT", 8884))
+MQTT_USER = os.getenv("MQTT_USER", None)
+MQTT_PASS = os.getenv("MQTT_PASS", None)
+
+
+def send_command(topic: str = "cmd/all", payload: dict | str = None):
+    """
+    Publishes an MQTT command payload to a given topic.
+    """
+    if payload is None:
+        payload = {}
+
+    if isinstance(payload, dict):
+        payload_str = json.dumps(payload)
+    else:
+        payload_str = str(payload)
+
+    auth = None
+    if MQTT_USER:
+        auth = {"username": MQTT_USER, "password": MQTT_PASS or ""}
+
+    publish.single(
+        topic=topic,
+        payload=payload_str,
+        hostname=MQTT_HOST,
+        port=MQTT_PORT,
+        auth=auth
+    )
+    print(f"[MQTT] Published command to '{topic}': {payload_str}")