MQTT - ChirpStack open-source LoRaWAN® Network

ChirpStack is an open-source LoRaWAN Network Server that provides components for building LoRaWAN networks. It includes a Network Server, Gateway Bridge, and Application Server. If you're interested in MQTT integration with ChirpStack, you may want to connect your devices and applications using MQTT, a lightweight messaging protocol.

Here's a general outline of how MQTT can be used with ChirpStack:

ChirpStack Configuration:

• Ensure that ChirpStack is properly installed and configured.
• Make sure that your devices and applications are set up within ChirpStack.

MQTT Broker Configuration:

• ChirpStack typically supports connecting to an MQTT broker for communication. You need to have an MQTT broker installed and configured.
• Common MQTT brokers include Mosquitto, RabbitMQ, and others.

The MQTT integration publishes all the data it receives from the devices as JSON over MQTT. To receive data from your device, you therefore need to subscribe to its MQTT topic.

Common MQTT topics in ChirpStack include:

Application-specific topics:

• All events for a specific APPLICATION_ID: `application/APPLICATION_ID/#`
• Uplink events for any device within a specific APPLICATION_ID: `application/APPLICATION_ID/device/+/event/up`

General application topics:

• All application events: `application/#`

Gateway-specific topics:

• Uplink events for any gateway: `gateway/+/event/up`

Note: Use "+" for a single-level wildcard, "#" for a multi-level wildcard.

	import paho.mqtt.client as mqtt
	import json
	# mqtt credentials
	mqtt_username = "< MQTT USER >"
	mqtt_password = "< MQTT PASS >"
	mqtt_address = "< MQTT URL >"
	mqtt_port = 1883
	mqtt_client = "clientname"
	# Topic for displaying everything related to gateway events
	gateway_up_topic = "gateway/+/event/up"
	# Subscribe to all topics under "application/
	application_topic = "application/#"
	# Topic for displaying everything related to a specific APPLICATION_ID (eg:39)
	application_individual_topic = "application/39/#"
	# Topic for displaying only the uplink payloads for a specific APPLICATION_ID (eg:39)
	application_individual_up_topic = "application/39/device/+/event/up"
	def on_connect(client, userdata, flags, rc):
	"""
	Callback function called when the client connects to the broker.
	"""
	print("Connected with result code " + str(rc))
	# Subscribe to the gateway and application topics
	client.subscribe(application_topic)
	#client.subscribe(application_individual_topic)
	#client.subscribe(gateway_up_topic)
	#client.subscribe(application_individual_up_topic)
	def on_message(client, userdata, msg):
	"""
	Callback function called when a message is received.
	"""
	# Decode the payload as JSON
	output = json.loads(msg.payload.decode())
	print(output)
	# Add your message processing logic here
	# Create an MQTT client instance
	client = mqtt.Client(mqtt_client)
	# Set the username and password for authentication
	client.username_pw_set(mqtt_username, password=mqtt_password)
	# Connect to the MQTT broker
	client.connect(mqtt_address, mqtt_port, 60)
	# Set callback functions
	client.on_connect = on_connect
	client.on_message = on_message
	# Start the MQTT client loop (blocking)
	client.loop_forever()

view raw mqtt_chirpstack.py hosted with ❤ by GitHub