It appears SmartThings have changed the rules for the PAT. Any PATs obtained now will expire after 24 hours and have more restrictions on the number of calls.
I think this means the end of the SmartThings apps for Homey.
The alternative to a PAT is to use OAUTH2 but each private key is limited to 500 users, which is nowhere near enough for Homey as my app has around 1500 users.
It is possible to apply for a key with more users, but I got no reply to that, probably because I am not a device manufacturer. I have a feeling that type of key would also incur a cost, which I think is why Athom dropped their app.
At the moment, any PATs obtained before January should continue to work.
Basically, SmartThings want to capitalise on the integration.
