npct
boiler
| npct | boiler | |
|---|---|---|
| 1 | 1 | |
| 7 | 0 | |
| - | - | |
| - | 6.2 | |
| over 3 years ago | 6 months ago | |
| HTML | Rust | |
| MIT License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
npct
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Ask HN: What have you built with ESPHome, ESP8266 or similar hardware
Back during the pandemic, hardware-based contract tracers were an idea. I built one using the ESP32; see https://github.com/tbensky/npct. In a nutshell, everyone generates a (non-centralized) hash for themselves based on local entropy. This hash is set to the BLE name of the ESP32. Turn it on and throw it in your backpack as you go out. When two ESP32s pass by each other, they both log the other's BLE name (hence hash). Later on, hash logs could be inspected and uploaded to a central server so you can see who encountered who. Seems like there's still some (non-Covid) applications for this (but I can't think of any). Fun project. Learned a lot about Bluetooth.
boiler
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Ask HN: What have you built with ESPHome, ESP8266 or similar hardware
I tend to roll my own with rp-picos for no good reason other than they're easy. Wattmeter for a toy solar installation - broadcasts a UDP packet every few seconds, which I then record into a staging JSON log that gets ingested into DuckDB. Little pico-w wifi temperature sensor that feeds into the raspberry pi zero that controls my boiler.
Thread about the boiler: https://hachyderm.io/deck/@dave_andersen/111579107766689328
github with some really crappy rust code: https://github.com/dave-andersen/boiler
The boiler control is the fun one but it's not entirely embedded stuff. Runs a little control loop that turns down the boiler modulation based upon the difference between target and current temperature. Improves operating efficiency by a fair bit and reduces temperature swings. Makes me wish residential HVAC systems were more sophisticated - these are things any good industrial control system can do.
Made an "ok to wake" light for my son -- added a controllable LED strip to his clock with a pico-w in it that changes from orange to multicolored at 6:30am as a non-intrusive "yes, you can come bug your parents" signal.)
https://hachyderm.io/deck/@dave_andersen/112091315519210298