MySensors is built around nodes that collect data and send it over radio to a gateway connected to the controller. For your application, it sounds like you would create a node that collects information from your controller. Then you would need to add a MySensors gateway to your Domoticz setup. I'm not sure what you mean when you say your controller can transmit the information. If your controller and Domoticz are on the same network, you could have your controller send data directly to Domoticz using http. There is info about that in the Domoticz Wiki. Or, if your controller and Domotics are on the same network, you could add a MySensors MQTT gateway to the network and have your controller sent data using MQTT messages. Take a look at the Getting Started and Build pages on this site and you will get a good idea of how MySensors could fit in.