Need help w building a sensor device

Hi, I am new to the hardware. I need a sensor device that can flash flight and send a notif when there is a person on a specific spot, and turn light off and send another notif when the person is gone. Will you please guide me through how to make it? I used to do web programming so I’m fine with software. If you can help me make a prototype, that’ll be great. I can pay a reasonable fee.

I appreciate your help. I CAN help you with finding reliable Chinese factories to make any electronic products (not too advanced) and ship them. I once helped a small company make customized Android phones with only 100 orders.

submitted by /u/ecruiser
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Original article: Need help w building a sensor device
Author: /u/ecruiser