Apple Home can't add my switch

Try these in order

1. Make sure your iPhone or iPad has Wi-Fi turned on.
2. Check that you entered the correct 8-digit HomeKit setup code.
3. The switch is ready to pair for the first 10 minutes after power-up. Stay within 10 feet.
4. Follow the Apple Home steps in order.
5. Still failing? Factory reset the switch and try pairing again.