Hey #electronics folks!
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Looking closely at the power consumption in deep sleep when the display attached, there's some irregular pattern going on!
This doesn't happen when the display is detached. So now it's a question of "through which path does power go through the display", I guess!
Fixing the hardware bugs on my CO2 sensor PCB today.
Turns out the high power consumption during deep sleep was due to the floating EINK_RES pin!
The ESP seems to have internal pullup resistors which it could activate, but it's not clear to me how to do that from Rust. So I'll just add an external pullup.
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Fixing the hardware bugs on my CO2 sensor PCB today.
Turns out the high power consumption during deep sleep was due to the floating EINK_RES pin!
The ESP seems to have internal pullup resistors which it could activate, but it's not clear to me how to do that from Rust. So I'll just add an external pullup.
I'm also considering adding a light sensor (to save power at night, when nobody is looking at the display anyway) and a piezo buzzer (for making cute chirping noises
)!What else could I add? A temperature sensor?
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