How do I add a custom device handler?

Hi @jkp thanks for the help!

I was working with the devices in 24VDC. Although the user manual says it support that voltage there were no way to exclude or include the device.
I switched to 220VAC and i have succeeded using the instructions of @wgmcg in the following post.

Qubino and Smartthings

Now I have a new problem, I can only manage this devices with the Classic App. They show up in the new version but I can not do anything with them. The app just say “checking status”.

Any suggestion?