Ask HN: What have you built with ESPHome, ESP8266 or similar hardware • Hacker News Board

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

#31

Post by 7839284023 » Sat, Apr 27, 2024, 4:49 PM UTC

sho_hn wrote: post #14

7839284023 wrote: post #6

I made my standing desk "smart": https://community.home-assistant.io/t/desky-standing-desk-es...

I love that! Now I am seriously tempted to hack up the control unit of my Fully and get it into Home Assistant so I can adjust the desk with a slider on the laptop for ... reasons.

There is also https://github.com/tjhorner/upsy-desky if you want to go for a more "professional" hardware look - but the kit is currently sold out.

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

#32

Post by jcims » Sat, Apr 27, 2024, 4:49 PM UTC

I built an automated apparatus to convert water, yeast and starch into sanitizer in April/May of 2020.

I used ESP32s for individual sensing components (mostly temperature at various parts of the process but also a load cell for weight). I used the Tasmota firmware and tied them all together using MQTT over wifi. I drove it with node-red on a raspberry pi to build several PID loops and process controls and if I were to do anything similar again I would use the same architecture except I would add network booting for the ESP32s so I could swap them out as needed.

Screenshot from a node-red dashboard from very early in the process.

https://imgur.com/a/so7iZJX

I ended up with 7 temp sensors and two load cells running on four ESP32s. By the time I had it optimized my job was to swap containers out every time it said to replace container over a speaker.

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

#33

Post by goda90 » Sat, Apr 27, 2024, 4:50 PM UTC

gumby271 wrote: post #24

I put together an esp32 + accelerometer in a little 3d printed box. Made two sets and taped one of each on my washer and dryer, now they detect the start and end of a cycle and send me a notification through home assistant. The tablet in the kitchen get a notification too and makes a special sound when the clothes are done!

Oh I like that. We have LG washer and dryer but I have 0 interest in connecting then to Wi-Fi. Right now we have a z-wave button sitting on the washing machine that starts a timer when we press it, but since the washing machine has variable run times, it's imperfect.

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

#34

Post by idatum » Sat, Apr 27, 2024, 4:50 PM UTC

Battery powered home front gate sensor using an ESP-01s and MQTT.

It's simple and I'm impressed that a single CR123A battery has lasted now 7+ months and still reading >= 3.1V.

https://www.idatum.net/remote-front-gate-sensor.html

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

#35

Post by praccu » Sat, Apr 27, 2024, 4:53 PM UTC

E Ink Todo list on my wall that pulls from Todoist, which I can update from my watch.

https://blog.praccu.com/

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

#36

Post by ixaxaar » Sat, Apr 27, 2024, 4:54 PM UTC

My AI chat thing: https://imgur.com/a/cxR8KpM (WIP). Connects to openai transcription, completion and tts APIs. Refactoring to use assistants, to use it to feed it my fridge's manual and have it think it's my fridge.

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

#37

Post by amluto » Sat, Apr 27, 2024, 4:55 PM UTC

mat_jack1 wrote: post #23

I'm helping our local Fablab to manage physical access with a series of ESP8266 and esp-rfid https://github.com/esprfid/esp-rfid/ (of which I became maintainer. If you want to use it as well I can help!)

I would pay real money for a system like this with actual security. The obvious starting point would be CTAP2 — the protocol is open, high quality fobs are inexpensive (not as cheap as Mifare, though) and widely available from multiple sources, and the protocol has been analyzed for real. One could probably even extract an actual production grade implementation of the NFC side from the Android sources. Apple Home Key support would be nifty, too. PIV would be another credible choice.

Extra bonus points for support for real commercial readers using OSDP’s transparent mode or whatever they call it these days. As I understand it, an early standard involved a horrible hack that was so horrible that HID managed to patent it, but the protocol was redone to avoid being a horrible hack, and the new version is also unencumbered. Although maybe the spec costs $30.

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

#38

Post by arbuge » Sat, Apr 27, 2024, 4:56 PM UTC

I built this once:

https://foundrytechnologies.com/relay.php

It didn't sell in large volumes but it's fun to see the units that did sell checking in every 5 minutes from around the world to this day.

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

#39

Post by blopp99 » Sat, Apr 27, 2024, 4:57 PM UTC

I have a Casino machine addon that connects to the cloud with json/websockets in production. And I have a vertical light controller for indoor farming. These arent with ESPHome. With ESPHome I have a water pump to recharge a big water container when gov sends water at certain times everyday.

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

#40

Post by sho_hn » Sat, Apr 27, 2024, 4:57 PM UTC

sp0d3rmun wrote: post #27

sho_hn wrote: post #2

My GPT-powered e-Ink newspaper uses an esp32: https://imgur.com/a/NoTr8XX

This looks amazing! Do you have a guide? Would love to recreate this!

My goals to release source and docs a la https://github.com/eikehein/hyelicht got waylaid by the ultimate DIY project of having a baby in November, but I will try to get it done this year!