/diy/ - Do It Yourself

Holy shit normies are so out of touch with reality.
>dads friends comes by
>he runs a small company that like helps old people and shit when they fallen and can't get up
>wants to expand his services by installing devices into his clients homes to detect if they fallen and can't get up
>got a quote from electronics company that does this kind of shit
>the number almost gave him multiple strokes
>"Hey anon you do like web design for a living?"
>i in fact like do like to do like a web design for a living
>here comes the boomer tech logic
>so since you know web design can you design, program and design ideal deployment for this fall'n'up system for cheap? apparently other companies use motion tracking for this or some shit
>...
>keeps looking at me
>...oh he wants me to get a design sketch, pricing and time tables right now of the top of my head...
>fuck it, i know what a resistor is, i can do this
>fire up aliexpress
>pic related
>motion sensor in each room sens signal over the wifi module to arduino when it detects movement, the arduino it self is connected to a wifi router, and if it doesn't detect input from any sensor within 60 minutes it DOESN'T do a GET request to a web server which is monitored by a dispatcher that sends the amberlamps there if no input is detected, whole system will cost like $20 from ping pong parts instead of $1000 from the retail jew
>boomer dude loves it, tells me to make a prototype happen, offers decent compensation
>agree to do it
so it should work in theory, but how reliable will it be? do you have any idea if this basic design can be improved? are there any flaws?
the downside here is that if the system fails i could become an unintentional serial killer over night