I swear. I'm not entirely sure why it worked this time, but I was able to get both blinds to pair. Despite trying these directions repeatedly in the past without success, this time it worked.
One thing I can't remember if I did last time or not was unplug my SmartThings hub while trying to pair the blinds. But here's what I did that resulted in success.
0) Unplug my SmartThings hub
- Re-pair my two Tradfri repeaters by inserting a bent paperclip into the pinhole on the front. (Both re-joined as previously paired devices.)
- Put the HE hub into zigbee pairing mode.
- Reset one blind by holding both buttons simultaneously for 5 seconds.
- Wait for first blind to pair... IT DID!
- Stop zigbee pairing on the HE hub.
- Start zigbee pairing on the HE hub.
- Reset second blind by holding both buttons down.
- Wait for second blind to pair... which it did!
- Rename both blinds from "DEVICE" to something meaningful.
- Change drivers/device type for both blinds to a4refillpad's driver.
- Re-plug in my SmartThings hub so I can control the one (very last ST device) smart plug stuck behind a bookcase that I'm too lazy to unload and so I can get to the plug...
Presto.
Shaking my head at how unmagical this process was, but happy it finally worked.
Thanks, folks!