Questions, support please don't open an issue and go to the community forum click here
To know the main functions of the gateway see below https://1technophile.github.io/OpenMQTTGateway/
See the wiki for more detailed information:
https://github.com/1technophile/OpenMQTTGateway/wiki
Download OpenMQTTGateway from the releases page
A list of supported 433mhz devices is available here:
https://community.home-assistant.io/t/433tomqttto433-gateway-device-list/7819
If you want to buy a coffee or other beverage so as to give me some support, here is a way to do it :