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by konschubert 2107 days ago
Okay, so now I know it’ll take between 5 years and one month :D

On the one hand, I have a bit of prior knowledge. On the other hand, I want a circuit with minimal power draw in ESP32 sleep mode and i’m afraid that does require some experience.
1 comments
andruby 2107 days ago
Does it have to be an ESP?

There are other microcontrollers capable of driving an eink display that consume a lot less power out-of-the-box. Eg: atmega328 (~5 μA deep sleep, ~10mA running)

If you want wifi, then ESP is probably a good and cheap fit. A wemos d1 in deep sleep doesn't consume _that_ much power (~80 μA), unfortunately it does draw a lot when booting (~200mA).

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konschubert 2107 days ago
Yes, I need wifi. And there are esp32 boards that draw 20uA in deep sleep.
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rohansingh 2107 days ago
Just a heads up, there's been a fair number of bugs and issues around sleep mode. Most of the problem seems to be in software and the situation has improved, but you might want to look into the exact state of things.

I'm working on an ESP32-based product that doesn't use sleep mode, but I've noticed people reporting issues about sleep mode on GitHub and in forums.

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