There are several reasons why you cannot connect to the cookware:
The cookware can be…
Connected to another device
If the LED light is green, this means that the cooker is connected to another unit – disconnect and try again.
Out of power
If the LED does not light up when you move the cooker, the battery has run out of power – replace the battery. See the manual instruction on how to change it.
Gone to Sleep
Tilt the cookware, when the lightguide lights up, the cookware is ready to connect.
You are using a device that does not support Bluetooth 4.0 or higher
Try connecting with another device.