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Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

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Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#111

Post by pridkett »

jasonjayr wrote: post #110

Don't have a git repo or pictures up; but I've built: 1) a fridge door monitoring system. We have a fridge in our garage that doesn't see frequent traffic, and it does NOT have an alarm on the door if it's left open too long. an esp8266 Watches 2 reed switches and transmits the status to home assistant. I 3d-Printed a case for the MCU + 2 holders for the reed switches (for the freezer + fridge) 2) A passive LIDAR bas…

I’ve done something similar with my fuel oil tank, except I’ve got an ultrasonic sensor threaded into my inspection port. It’s connected to a PoE powered ESP32. And now you’ve got me really concerned that even though I’ve got two compartments on the case (which itself is shoved inside a PVC pipe), I should probably do more to move the PoE powered ESP further away.

All that so I can be sure I have enough heat on really cold days or if the power goes out.

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#112

Post by cocoflunchy »

dgacmu wrote: post #101
cocoflunchy wrote: post #70

Earlier quoted context omitted.

I also made an "ok to wake" alarm clock for my daughter :) https://cosmith.fr/projects/nightbox

Oh my gosh that is totally charming! The clock i repurposed for ours has a bit too much of a "this belongs in an office" vibe. Fun to see how different the same idea ends up. I had the same concern about kid-proofing, but I took the route of putting mine on the wifi and using NTP instead of an RTC. (Because it knows the date, it plays different patterns on holidays and on his birthday.)

Yes I didn't have the pico w but in retrospect it would be nice to be able to change the wake up time remotely when you want to sleep in a bit!

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#113

Post by slake »

Shish2k wrote: post #94

I made a glowy box that takes up 1U in my homelab rack and represents my home internet reliability - an esp32c3 (risc-v, experimenting with the rust support) which pings 8.8.8.8 every minute and shows the past 30 minutes of results on a strip of 30 LEDs (green -> red for ping time, blue for errors)

That's a great project. Have you documented anything. Sounds doable, but a leg up would be great.

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#114

Post by briHass »

jasonjayr wrote: post #110

Don't have a git repo or pictures up; but I've built: 1) a fridge door monitoring system. We have a fridge in our garage that doesn't see frequent traffic, and it does NOT have an alarm on the door if it's left open too long. an esp8266 Watches 2 reed switches and transmits the status to home assistant. I 3d-Printed a case for the MCU + 2 holders for the reed switches (for the freezer + fridge) 2) A passive LIDAR bas…

I wouldn't worry too much, diesel/fuel oil isn't like gasoline or other volatile flammable liquids that ignite easily from sparks. The burner 'gun' gets it to flame only by atomizing it with an intricate nozzle, lots of air, and 100 psi of pressure.

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#116

Post by neodypsis »

steve_adams_86 wrote: post #105

This is sort of on topic, except I haven’t finished. I’ve been working on making a magnetic stirrer with an integrated scale and heating. It isn’t specific to esp or esphome stuff, but I happen to be using an esp32 to power it. I wanted to buy a stirrer and discovered even the most basic equipment is extremely expensive. Once you add heat, let alone heat control that’s accurate with a digital readout, or a scale, pri…

> I know the one I make isn’t going to be as precise or accurate, the build quality won’t be as good, but it’ll be good enough for my purposes.

Have you had issues with the ESP32's ADCs?

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#117

Post by MisterBiggs »

I lived in an old apartment with a heater thats pilot light would regularly die. I connected a thermoprobe to an ESP8266, connected it to the heater. If it detected the pilot went out it would spam a Telegram chat that me and my roommate were in. Super cheap fix that saved me from waking up frozen.

Re: Ask HN: What have you built with ESPHome, ESP8266 or similar hardware

#118

Post by yjftsjthsd-h »

stavros wrote: post #74

I've built tons of things. Most usefully, I built presence/motion/light/temperature sensors for my home, along with IR transmitter so I can control my TV/AC. They're about the size of two matchboxes, they cost about $10 each and they're amazing for my home automation: https://gitlab.com/stavros/sensor-board/ I've built cat toys for my blind cat, toy planes, a CNC, a cat feeder, a back-scratching robot, and more stuff…

> along with IR transmitter so I can control my TV/AC

Any pointers for doing this? I've wanted to do this for a while

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