Travis Cox shows how to set up the store-and-forward system in both the MQTT Engine Module and the MQTT Transmission Module. Store-and-forward is very critical to applications because if you lose connection to either side, you lose data. This demo is a pure MQTT solution, meaning it will work with third-party edge nodes or applications. Travis also shows how to buffer data locally when a connection is down and bring that data back to the historian once the connection is restored.