Please follow the power cycle procedure:
1. Delete the TC-KR device from the original connected phone.
2. Unplug the 9V battery, wait for at least 10 seconds.
3. Plug the 9V battery back into the TC-KR.
4. Open the “K-Rain BL” app and connect to the correct controller.
5. Look for the following screen. (this is a MUST).
6. The rest of the procedure remains the same.