dc3-driver-lorawan ingests LoRaWAN uplinks by subscribing to ChirpStack MQTT topics (application/+/device/+/event/up). It decodes the JSON payload, caching the latest FRMPayload (base64) and Cayenne LPP object fields per DevEUI. Reads resolve a point against the cached DevEUI; writes publish a downlink command to the ChirpStack command/down topic.

Module Information

Group ID: io.github.pnoker
Artifact ID: dc3-driver-lorawan
Driver Name: LoRaWAN Driver

Driver Attributes (Device-level)

Attribute	Code	Type	Default	Description
Application ID	applicationId	STRING		ChirpStack application ID for downlink
Broker URI	brokerUri	STRING	tcp://dc3-mqtt:1883	MQTT broker URI for ChirpStack events
Subscribe Topic	topic	STRING	application/+/device/+/event/up	MQTT uplink topic filter
Username	username	STRING		MQTT broker username (optional)
Password	password	STRING		MQTT broker password (optional)

Point Attributes

Attribute	Code	Type	Default	Description
DevEUI	devEui	STRING		LoRaWAN device EUI (16 hex characters)
Field	field	STRING		Cayenne LPP object field; empty returns raw base64

Command Attributes (write)

Attribute	Code	Type	Default	Description
DevEUI	devEui	STRING		Target device EUI for the downlink

The module application.yml is authoritative for attribute codes, types, defaults, scheduling, health, and local buffering. Keep this README aligned when those user-facing settings change.

Prerequisites

A ChirpStack instance publishing uplinks to the configured MQTT broker topic (application/+/device/+/event/up).

Running Locally

make up-db
make up-dev GROUP=core
mvn -s .mvn/settings.xml -pl dc3-driver/dc3-driver-lorawan -am package
java -jar dc3-driver/dc3-driver-lorawan/target/dc3-driver-lorawan.jar

Testing

mvn -s .mvn/settings.xml -pl dc3-driver/dc3-driver-lorawan -am test

dc3-common-driver — Driver SDK for registration, scheduling, and RabbitMQ integration

README.md

DC3 Driver LoRaWAN

Overview