Initial commit: UlHub workspace

test/publish_sample.py

@@ -0,0 +1,35 @@
+import json
+import os
+import time
+from datetime import datetime
+
+import paho.mqtt.client as mqtt
+
+BROKER_HOST = os.getenv("MQTT_HOST", "127.0.0.1")
+BROKER_PORT = int(os.getenv("MQTT_PORT", "1883"))
+USERNAME = os.getenv("MQTT_USERNAME", "testuser")
+PASSWORD = os.getenv("MQTT_PASSWORD", "testpass")
+TOPIC = os.getenv("MQTT_TOPIC", "devices/demo")
+INTERVAL = float(os.getenv("MQTT_INTERVAL", "2"))
+
+client = mqtt.Client()
+if USERNAME:
+    client.username_pw_set(USERNAME, PASSWORD)
+
+client.connect(BROKER_HOST, BROKER_PORT, 60)
+
+try:
+    counter = 0
+    while True:
+        payload = {
+            "message": f"hello from host {counter}",
+            "timestamp": datetime.utcnow().isoformat() + "Z",
+        }
+        client.publish(TOPIC, json.dumps(payload), qos=0)
+        print(f"published to {TOPIC}: {payload}")
+        counter += 1
+        time.sleep(INTERVAL)
+except KeyboardInterrupt:
+    print("stopped")
+finally:
+    client.disconnect()