LoRa, MQTT and Oled

tests/mqtt/cpython_example_listener_zephyrus.py

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+"""Small CPython MQTT example.
+
+Listens and prints all received messages on the subscribed channel continuously.
+Set MQTT_BROKER_HOST to the broker IP address, not localhost.
+"""
+
+import os
+import time
+from pathlib import Path
+
+from shared.mqtt import BrokerClient
+
+
+BROKER_HOST = os.getenv("MQTT_BROKER_HOST", "192.168.50.1")
+TOPIC = "smartwave/demo"
+USE_TLS = os.getenv("MQTT_CLIENT_TLS", "true").lower() in {"1", "true", "yes", "on"}
+CA_FILE = os.getenv(
+    "MQTT_CA_FILE",
+    str(Path(__file__).resolve().parents[2] / "orchestrateur" / "mqtt" / "certs" / "ca.crt"),
+)
+
+
+def main():
+    client = BrokerClient(
+        host=BROKER_HOST,
+        client_id="zephyrus",
+        use_tls=USE_TLS,
+        cafile=CA_FILE,
+        keepalive=30,
+    )
+
+    print(f"Connexion au broker: {BROKER_HOST}...")
+    client.connect()
+    
+    print(f"Souscription au topic: {TOPIC}...")
+    client.subscribe(TOPIC, qos=2)
+
+    print("En attente de messages... (Appuyez sur Ctrl+C pour quitter)")
+    
+    try:
+        while True:
+            # Traite le réseau et récupère les paquets MQTT entrants
+            client.poll(0.1)
+            
+            # Récupère le message dans la file d'attente de la librairie
+            message = client.get_message()
+            if message is not None:
+                # Décodage du payload pour un affichage plus propre en texte
+                try:
+                    payload_str = message['payload'].decode('utf-8')
+                except Exception:
+                    payload_str = message['payload']
+                
+                print(f"[{message['topic']}] reçu : {payload_str}")
+                
+    except KeyboardInterrupt:
+        print("\nArrêt utilisateur")
+    finally:
+        client.close()
+        print("Connexion MQTT fermée.")
+
+
+if __name__ == "__main__":
+    main()