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1366 points aleksi | 3 comments | 14 Oct 24 15:19 UTC | HN request time: 0s | source
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blutack ◴[14 Oct 24 17:02 UTC] No.41839455[source]▶
If you're looking for something with an addressable LED matrix in a clock style form factor, the Ulanzi TC001 [0] for ~$50 is worth having a look at.

Doesn't quite have the same aesthetic but inside it's just an ESP32 (flashed via the USB-C port) and there's various mature open source firmware replacements. I use awtrix[1] on mine and it's very easy to tie in HomeAssistant for doorbell notifications and that sort of thing. I did also knock up a Pomodoro app for it.

0: https://www.ulanzi.com/products/ulanzi-pixel-smart-clock-288...

1: https://github.com/Blueforcer/awtrix3

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1. purpleidea ◴[14 Oct 24 17:34 UTC] No.41839772[source]▶
Neat! Can't tell if it has a speaker at the back or not. Would like to play sounds or alarms...

I'd love to attach this to a PoE to USB-C ethernet adapter to talk to it over API via hardwired. Still looking for something like that. The flipper busy bar seems to at least have some connectivity over USB.

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2. wildekek ◴[14 Oct 24 18:47 UTC] No.41840574[source]▶
It has a small piezo buzzer, and you can use it to play RTTTL sounds. https://blueforcer.github.io/awtrix3/#/sounds

I have to warn that it sounds like hot garbage though. The neat thing with ESP32 devices is that you can make it sound okay using its built in 8-bit DACs, or great using I²S.

Speaking of hardware hacking; you can also get POE/LAN adaptors for the ESP32, if you have free hardware pins left for it.

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3. blutack ◴[14 Oct 24 22:38 UTC] No.41842907[source]▶
+1 for the hot garbage piezo, but as OP says the ESP32 has a lot of fun hacking potential and there's plenty of space in the case especially if you remove the battery.