Balena block support for Paho MQTT-SN Gateway

This builds all SENSORNET types of MQTT-SNGateway

It currently runs the UDP MQTT-SNGateway

The following environment variables need to be set within the Balena environment. These are then set into the MQTT-SN gateway.conf file

Balena Variable	MQTT-SNGateway build
RUN_MQTT_SNGATEWAY	Whether to start up the gateway application
SENSORNET	[udp (default) / udp6 / xbee / loralink / rfcomm / dtls / dtls6]

Balena Variable	gateway.conf Setting
ENV_BROKER_NAME	BrokerName
ENV_BROKER_PORT	BrokerPortNo
ENV_BROKER_SECURE_PORT	BrokerSecurePortNo
ENV_GATEWAY_PORT	GatewayPortNo
ENV_MULTICAST_IPV6_PORT	GatewayIPv6PortNo
ENV_MULTICAST_IPV6	MULTICAST_IPV6
ENV_MULTICAST_IPV6_IF	MulticastIPv6If
ENV_MULTICAST_HOPS	MulticastHops

Testing

You can use the code here to publish and subscribet to messages flowing through the MQTT-SN broker

https://github.com/njh/mqtt-sn-tools

To Subscribe to 'sensor' topic

$ ./mqtt-sn-sub -h $LOCAL_IP_ADDRESS -p 10000 -t sensor -v

To Publish to 'sensor' topic

$ ./mqtt-sn-pub -h $LOCAL_IP_ADDRESS -p 10000 -t sensor -m Hello

TODO

• Add more environment variables for configuring upstream broker / port etc.
• Currently runs in host network mode. Need to look at configuring up custom network in docker-compose.yml