- import paho.mqtt.client as mqtt
- import json
- # MQTT broker hosted on the Jetson Nano or any other broker accessible
- broker_address = "localhost" # Replace with your MQTT broker's IP address or hostname
- port = 1883 # Default MQTT port
- # Callback function when a connection is established with the MQTT broker
- def on_connect(client, userdata, flags, rc):
- print("Connected with result code " + str(rc))
- # Subscribe to the topic
- client.subscribe("topic/test") # Replace with your topic
- # Callback function when a message is received from the MQTT broker
- def on_message(client, userdata, msg):
- print("Received message on topic " + msg.topic + ": " + str(msg.payload.decode()))
- # Example: Decode JSON message (if applicable)
- try:
- message = json.loads(msg.payload)
- print("Message details:")
- print(" - Message: " + message["message"])
- print(" - Value: " + str(message["value"]))
- except json.JSONDecodeError as e:
- print("Received non-JSON message format.")
- # Create a MQTT client instance
- client = mqtt.Client("JetsonNanoSubscriber")
- # Assign callbacks
- client.on_connect = on_connect
- client.on_message = on_message
- # Connect to the broker
- client.connect(broker_address, port)
- # Blocking call that processes network traffic, dispatches callbacks, and handles reconnecting.
- client.loop_forever()
[text] code
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