Just saw this. Here’s what I did.
First, I made sure the blinds were paired with the repeater. Not sure I needed to do that; once they’re paired with SmartThings, I could unplug the repeater and they’d still work. To pair with the repeater, just make sure the Ikea remote works with the blinds. If not, take the back off the Ikea remote, hold it within 5 cm of the repeater, hold down the pairing button on the back of the remote for 10+ seconds until the remote glows red. Now the remote is paired with the repeater. Now pair the remote with the blinds: hold down the two buttons on the blinds, near the battery pack, for < 5 sec. Then hold the remote within 5 cm of the buttons on the blinds and hold the pair button on the remote for 10+ seconds until the light in the remote glows red.
So now you can control the blinds with the remote. Yay!
Now, install the device handler. Sorry, I don’t remember the details of that, but there are many descriptions on these forums of how to do that.
With the device handler installed, I put the SmartThings hub in the same room as the blinds, ~ 23 feet away. Probably didn’t need to do that either, as long as it was in Zigbee range of the blinds.
Then, I pushed both buttons on the blinds for 5+ seconds, until the white light on the blinds started to pulse. Then I opened the classic app and hit “+” to add a device, and waited for it to auto-add. I didn’t do the manual add. Nothing showed up, so I had to re-do it a couple times. I also took the battery out, tried charging it but it was already full, and put it back in. Eventually, the blind showed up in the SmartThings app as a generic “Thing.” I edited the name, in my case to “Basement Back Blind” and hit save.
Ok, so now I have it in the Thing list in SmartThings, but it doesn’t know it’s an Ikea blind and can’t do anything with it.
So, I went to the IDE (https://graph.api.smartthings.com/), chose “My Devices,” (https://graph.api.smartthings.com/device/list), the device (“Basement Back Blind” for me), “Edit”, then changed type to “IKEA Smart Blinds,” which was near the bottom of the list of types, not in the “I” section.
Then I hit save and I was good to go!
I haven’t tried pairing the remote with SmartThings yet.