Interesting. I wonder if mine has a different firmware on it. No matter what I do now, I can't get it to pair to my C8.
Pressing the pairing button 4x definitely seems like the way. Every time I do, the hub detects it but it never initalizes.
What driver are you using?, the ones from here: [RELEASE] IKEA Zigbee drivers - #117 by dandanache
When I get a minute I might try pairing it to my C7.
