All, this looks great. I have two HVAC connected to a Samsung hub. It can’t complete the handshake no matter what port I try, so it doesn’t work.
Any help?
Edit: seems that, during the test, something is wrong with the pem files. It says bad end line. Does this help?
New episode: their ‘AI fridges’ stopped working for some after an update… 
Does the main feature delivering target advertising right to your families kitchen fail or only secondary (unimportant) features like cooling/freezing 
One day left before the SmartThings integration stops working for non-paying users. I used the integration to keep track of my parent’s smart devices without dealing with their clunky smartphone app. The HA integration was simple, reliable, and efficient. What a waste.
Enshitification reached a (matter enabled) fridge near you 
Not that this wasn’t well known or expected… 
… contributes to the “disposable smart home” phenomenon, where the utility and interoperability of hardware are contingent upon manufacturer-controlled pricing models and API availability.
Unbelievable evil towards their customers. Never ever any Samsung again here!
@mikla90 about the bad end line. I broke a PEM file on purpose to see when OpenSSL says that (3.6.4 here, checked with openssl asn1parse). I got it from a blank line inside the base64 part, and from a cert and a key joined with no newline between them. Windows line endings and a missing last newline gave no error, and a UTF-16 file gave no start line instead. So I’d look for an empty line in the file, or a key pasted right after the cert. Also current LocalThings (I’m on 0.31.0) doesn’t ask for pem files first. It tries its own self-signed cert, and only if the appliance refuses that cert it offers a pre-shared key or the CA. The handshake I can’t help with. My washer refuses right at the first hello with handshake_failure, same on 0.31.0 today, and setup just stops there. The setup text says some appliances take a pre-shared key instead and LocalThings can’t get that key itself.
@dualtronic one data point from after the date. My SmartThings integration still gets updates as of Oct 3, 04:45 UTC. The fridge power sensor got 109 updates on Oct 1 and 75 on Oct 2 (UTC days). The week before it was 72 to 106 a day. On Oct 2 there was a gap of about 7 hours with no updates, then it came back by itself. That sensor also had 8 gaps of 1 to 8 hours in the last 11 days of September. HA also called a SmartThings scene 9 times on Oct 2, and the log has no SmartThings errors for that day. I haven’t paid for anything. My account is in Korea, so I don’t know if it’s the same everywhere, or if it’s just not switched on yet.
The integration remains running as of this post. Is Samsung teasing us with a reprieve?
I guess nobody cares at this point anymore 
?
The people who have found an alternative won´t come back to Smarthings - and the damage to Samsung reputation is done.