When sensors are packaged, they are put into box mode and need light to wake up.
Take sensors out of the box and place them in a well lit room for at least 45 seconds before installing.
Some sensors are more sensitive than others. Make sure you give it a solid double tap.
Cycle the Battery
If the steps above don't work, twist the top of the enclosure off the sensor and cycle the battery. To do this, gently lift the battery straight out of the casing and re-insert it.
If you don't see a blue light flash here, please take the battery out again and discharge the sensor before placing it back in the holder. Pictured below is how to do that:
If you still can't get sensors to wake up, contact support at 877-668-4660 or email us at firstname.lastname@example.org.