Link Meross to samsung smartthings. Once that is up and running and working fine then you need to install the Smartthings 2 app from Github GitHub - AdyRock/com.smartthings: Home app to integrate SmartThings. Once installed follow the instructions to get a bearer code to plug into the homey smarthings 2 app and then add devices as normal.
To install a third party app fromm Github that is not part of Athom is a little tricky and difficult the first time but can be done.
start here [HOW TO] CLI install method - Tutorials - Homey Community Forum.
