Hi Jean,

Could you please take a screenshot and send it to support@netrohome.com?

Thanks,

Netro Support

Hi Jean,

Please try leave the sensor under direct sunlight for several more days. 
If you have traditional incandescent bulb lamp, you can also put the sensor solar panel closely under the incandescent bulb for severl days. 

Please let us know if the sensor still not get charged after a week. 

Thanks
Wency 
Netro Support