#Pressure Mat

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prisma sphinx
ionic silo
prisma sphinx
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I think you may have shared that with me a long while ago— I had it bookmarked anyway.

I’m just curious about the state of off the shelf solutions

ionic silo
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you can also make a "pressure mat" with some tin foil a piece of paper and a plastic document wallet. wires to an esp32 😛

prisma sphinx
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I’ve got way less time to tinker these days

ionic silo
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look at this one - https://www.elevatedsensors.com/

Elevated Sensors
Elevated Sensors

Elevated Sensors helps you bring your DIY to a new level. Elevate your smart home experience with our high-quality, reliable, local sensors designed to seamlessly integrate with leading home automation platforms like Home Assistant and ESPHome. Discover the power of connected living and take control

prisma sphinx
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Thanks!

ionic silo
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"pressure mat" I made a while back. foil on ether side of paper creates a capactor and the capacitence changes when its under pressure which you can read with esp32 😛

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i was bored one day last year...

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another strategy is weight sensors under the legs of the bed.

prisma sphinx
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that’s pretty darn responsive

ionic silo
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I used it for a practical joke too

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put it under couch cusion to ring the doorbell when sat on. but i added a random delay between 1 and 5 minutes. so everytime person sat down doorbell went shortly thereafter but nobody there. happens a few times they think someone is messing with them (which they are but not in the way they think) so they watch out the window for some to come back after a while they give up and sit back down and...

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I truly am an awful person at times

prisma sphinx
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that’s pretty diabolical

ionic silo
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usb power bank hidden in the ouch to ensure no suspicious wires

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also tbh a mmwave sensor with zone support probably works in majority of cases too

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and you can use it for other stuff in the room too

prisma sphinx
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I have those throughout the house, including the bedroom— my thought is continue to control the lights in the BR with the mmwave, but use the mat to trigger “bedtime.” This would eliminate false positives from my dog walking into the room late evening.

ionic silo
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but you could have a "zone" that is just the bed. if dog jumps on bed it triggers though (although pressure mat may suffer the same)

prisma sphinx
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yeah, I have it set like that

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If I can tune the mat for specific pressure ranges (I’m actually not sure if this is trackable) and add a “detected for” I think it’ll get me where I want to go.

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I get false positives now with the mmwave because of where my dog sleeps (under the bed

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)

ionic silo
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capacitence based pressure mats can also be tuned but wont be as accurate as a FSR and can go a bit wild under impulse

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bed presence detection is a fun project tbh. theres a bunch of solutions.

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there are more "commercial" solutions too that they use in hospitals, care facilities and the like to detect "patient out of bed" which are basically the same as consumer grade but they charge more cos they are "medical" which is probably to cover any legal liabilities etc...

prisma sphinx
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I’ve thought about using one of the mats under my motorcycle in the garage to trigger a bunch of stuff— but that frankly seems insane 😁

ionic silo