Explanation Text, letter Description automatically generated Box 1: $connectionModuled Add a route that tells the edge hub to route any message received by the IoT Edge device that was not sent by an IoT Edge module. Box 2: $upstream Send messages to $upstream, which passes the messages to the connected IoT Hub. Reference: https://docs.microsoft.com/en-us/azure/iot-edge/tutorial-machine-learning-edge-06-custom-modules