One of the ways in which the Cinder Grill communicates is by lighting up the ring around the control knob in various colors. Here is a brief guide to those colors and their meanings:
Off: Idle mode (the Cinder Grill is not currently performing any task)
Solid blue: Cooking under manual control.
Flashing blue: Cooking under remote control via the App.
Yellow: Calibrating the device
Green: Calibration successful
Red: Searing mode or error signal.