[HN Gopher] Low-cost Smartwatch powered by ESP32 module
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Low-cost Smartwatch powered by ESP32 module
Author : ofrzeta
Score : 91 points
Date : 2023-08-08 19:35 UTC (3 hours ago)
(HTM) web link (linuxgizmos.com)
(TXT) w3m dump (linuxgizmos.com)
| MaxikCZ wrote:
| I can see it uses 3.7V/400mAh battery, but whats the actual
| battery life?
| 542458 wrote:
| AliExpress reviews seem to say 12h or so with all the power
| saving features turned on.
|
| Without the power-saving... An ESP32 draws 90-240ma when
| active, and I'm sure the battery capacity is significantly
| overstated, so if you just flash a simple Arduino sketch it'll
| probably drain the battery in under an hour.
| afavour wrote:
| This mostly just reminds me that I really miss my Pebble Time
| Round watch. Perfect form factor, great battery life.
| ilyt wrote:
| I had original Pebble and even 7 day battery life was a bit
| annoying, couldn't imagine having to charge my watch every 2-3
| days as some modern smartwatches have. Ended up getting just a
| solar powered casio with no smart features whatsoever...
|
| Garmin makes ones with over 2 weeks of battery life but for the
| money I can't excuse spending on a watch just to get some
| gadgets.
| tasty_freeze wrote:
| Although I've been a working EE for 40 years and understand how
| exponential growth works, I'm still shocked at how powerful it is
| and how little it costs.
| wlkr wrote:
| Funny to see this here as I stumbled upon this company earlier
| today. They seem to have a wide range of interesting products and
| an active GitHub account.
|
| https://www.lilygo.cc/collections/all
|
| https://github.com/Xinyuan-LilyGO/
| dvh wrote:
| I managed to make esp32 stream video for 6h using two 18650
| batteries. It is hungry.
| hinkley wrote:
| What's the low power alternative?
| Corsome wrote:
| I wonder if the display could be changed to
| https://www.waveshare.com/product/rp2040-lcd-1.28.htm
| joshmarinacci wrote:
| I have played with this device and got CircuitPython working on
| it. It's fairly undocumented but with the demo apps source I
| could get the touch, accel, and screen working. However I've
| not been able to get the battery to last more than an hour even
| with screen blanking.
| PMunch wrote:
| I saw that waveshare link and was really hoping for some eInk
| stuff. I would buy a package like that in a heartbeat if it had
| eInk. Heck, might even get a couple if the price was right.
| traverseda wrote:
| Exactly what you're looking for https://watchy.sqfmi.com/
| award_ wrote:
| Wow very neat, thanks! Happen to have any other similar
| suggestions? That one is backordered for months.
| SparkyMcUnicorn wrote:
| I have this watch, and got it to tinker with since it had some
| fun sensors, mic, and speaker.
|
| Haven't turned it on in a while, but the battery life was
| definitely measured in minutes. It will not last anywhere close
| to a full day, even with a bunch of optimizations and certain
| things turned off. Even with the display off, ESP32s drain tiny
| batteries.
|
| It's only practical for tinkering, and an M5Stack is definitely a
| better choice for that.
|
| EDIT: Checked my notes. I was able to get it past the 24 hour
| mark with some work.
|
| This repo has some helpful info: https://github.com/Xinyuan-
| LilyGO/TTGO_TWatch_Library/blob/m...
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(page generated 2023-08-08 23:00 UTC)