I want to publish a message to IoT Hub and also receive the message via the same topic. I connected to IoT Hub and then subscribed to the same topic to which i send the messages, but I don't receive any message. As Client I am using MQTTX windows. Messages are sent and received correctly at the cloud endpoint (telemetry data).
Here is a screenshot from my MQTT client: MQTT Client
I see you are using MQTTX as a leaf device to IoT Edge in a transparent gateway pattern, where edge will just pass through messages to IoTHub.
IoTHub does not support custom topic or respond back on the same topic so this "devices/plc2/messages/events/topic" will not work
Subscription to devices/{device_id}/messages/devicebound/# will work but you will need to explicitly send C2D message for that device_id as a response
