LED POWER ADAPTERS FROM IKEA WORK with smartthings 2018
I installed two Tradfri Drivers on my SmartThings 2018 hub. How?
Forget the 20/10/10 second pairing mode, the only thing what you need to change is your smartthings hub ZIGBEE CHANNEL, Ikea dont like the chanell 24 what is default channel for smartthings hub.
Click on "My Hubs"
Click on your newly setup Smart Home Hub, the default name of it would be "Hub" if you didn't change the name after setup.
At the bottom, click on "View Utilities"
Select one of these channels: 14 (works for me)
reboot your hub
And after that normaly search start the THING search from smartthings.
Plug in light with the driver and turn it on.
Then press reset button about 6sec, the light will blink and after that stays on.
Now you can see your device in smartthigns app.