The button sequence to trigger a factory reset can be tricky. Here’s how it’s done:
- Begin holding the MODE button down.
- While holding the MODE button down, tap the RESET button briefly.
- After 3 seconds the core will begin blinking yellow, KEEP HOLDING the MODE button.
- After 10 seconds the core will begin blinking white. When this happens the factory reset process has begun. Let go of the MODE button.
When it stops blinking white, it should begin blinking blue, indicating that it is listening for WiFi credentials.
Follow the instructions on the docs site to provide the WiFi credentials to the core.