Wency Pan
Updated at 2021-11-02 02:13:13 UTC

Hi Alan,

Please try place your sensor under direct sunlight for about 3-5 days, then press the power button again to see if it works.

If you have incandescent light bulb (not LED) at home,  you can place your sensor under the light bulb for about 2 days and check if it works. 



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