Init

tests/mqtt/cpython_example.py

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+"""Small CPython MQTT example.
+
+Publish a QoS 2 message and then subscribe to the same topic.
+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", "localhost")
+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="smartwave-cpython-demo",
+        use_tls=USE_TLS,
+        cafile=CA_FILE,
+        keepalive=30,
+    )
+
+    client.connect()
+    client.subscribe(TOPIC, qos=2)
+    client.publish(TOPIC, "hello from CPython", qos=2, retain=False)
+
+    deadline = time.time() + 3
+    while time.time() < deadline:
+        client.poll(0.1)
+        message = client.get_message()
+        if message is not None:
+            print("received:", message)
+            break
+
+    client.close()
+
+
+if __name__ == "__main__":
+    main()