MQTT send to Dragino I/O Controller LT-22222-L

[cjochum71]

Hello, I have a problem understanding. Is it correct that I can send a payload to a Lorawan device from your Lorawan server via Mqtt.
I'm desperately trying to send a signal to a Dragino LT-22222-L I/O controller. According to the manufacturer I should send a downlink payload of the type "0100001E".
What do I have to define and how so that I can send data via MQTT via the Lorawan server to the I/O controller.
Here is a screenshot of my config:
It would be great if you could give me some help getting started:
Thanks in advance