tommyjlong / omg

Custom version of OpenMQTTGateway

Open MQTT Gateway - LoRa Sensors

This is a modified version of Open MQTT Gateway. This is part of a LoRa mailbox sensor project that you can find more details about here.

OMG has been modified to use OMG's "ValueAsATopic" capability for LoRa sensors that provide a node-id in their JSON message payload. "ValueAsATopic" is a configurable item in OMG that, when enabled, allows some "value" in the payload received from a sensor to be tacked onto the end of the MQTT topic as a subtopic. This "ValueAsATopic" however does not exist in OMG for LoRa based sensors, so modifications were made to OMG that would allow it to parse the node-id from the message and tack it onto the MQTT topic. For example, if the node-id is 12345678, the MQTT topic will now look something like:
/home/OpenMQTTGateway_ESP32_LORA/LORAtoMQTT/12345678

Modifications were also made to make use of a LILYGO TTGO v1 OLED display. When the OMG first boots up, it will display a simple message saying the LORA GW is Ready, and later on will display the LoRa message it received from a LoRa Sensor.

Finally, there are a couple of 3D printed parts that are available for the LILYGO TTGO v1 OLED display and its antenna.

Credits

• Open MQTT Gateway.
  You can find more details by going to there github repository here as well as their community forum here:
• 3D Printed Part for Lilygo TTGO
  The 3D part originated from Neodyme at Thingiverse, but I heavily modified it so that the top side could more easily fit into the casing, and I changed the antenna orientation too.