What is the absolute simplest way to send a simple signal from

>>1182893
The most simple way is to use a wire.

>>1182893
Make a clapper that is triggered by the pressure sensor and then use:
https://www.youtube.com/watch?v=Ny8-G8EoWOw

>>1182893
esp8266 - cost a couple of bucks plus you need a programming interface for another $4-5. wifi output

to keep things simple, various wireless gadgets can be repurposed: wireless doorbell, RC car, wireless window alarms, even an old wirelss phone if you have the space to hide it in.

>>1182893
>What is the absolute simplest way to send a simple signal from one circuit board to another wirelessly?
A servo, Rolling dominos. and a switch.

>>1182893
most people don't step on the door mat when they knock/ring the bell
just sayin

>>1183000

Whoopie cushion under the mat and sensitive microphone

A ramp, bowling ball and some empty cans

A PIR motion sensor would probably be easier and less susceptible to weather damage. Probably wouldn't cost any more either.

One of those shitty garage door wireless remote relay thingos, $5 no micros no fucking around, tiny already built

I think a motion sensor and/or camera would serve you better. No false positives if you set it up right, and far fewer false negatives. I use an old smartphone for that kind of thing.

>>1182893
NRF24L01

>>1182893
Pro Tip: No one will stand on your mat before actually coming inside unless you place it way further away from the door. Otherwise you would open the door to directly face your guest.