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Connect IMU Int pin to the esp

M5 Stick/StickC

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xxx_yyy
last edited by

Hi!
Is it possible to disassemble & connect IMU INT pin to some GPIO?
I'd like to add Wake On Motion to the stick and it looks like IMU supports that (checked StickCPlus libs).
Idk why StickCPlus2 doesn't have int pin connected
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felmue @xxx_yyy
last edited by

Hello @xxx_yyy

IMU in M5StickCPlus2 is running from the battery and IMU INT is connected to the power on logic. So it should be possible to setup WoM, then turn ESP32 off and then upon motion IMU INT turns ESP32 back on again.

Thanks
Felix
GPIO translation table M5Stack / M5Core2
Information about various M5Stack products.
Code examples
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xxx_yyy @felmue
last edited by

@felmue According to the scheme INT is not connected to anything link text
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felmue @xxx_yyy
last edited by

Hello @xxx_yyy

I stand corrected. My apologies. You are absolutely correct: IMU INT in M5StickCPlus2 is not connected to anything. (I was looking at the RTC INT.)

That said - and to answer your original question - yes, it is possible to connect the IMU INT pin to an ESP32 GPIO. Please see here.

However it would only allow to wake ESP32 from deep/light sleep, but not to turn M5StickCPlus2 back on from being powered off due to the fact that IMU is powered from 3.3 V (and not like RTC from VBAT_IN).

Thanks
Felix
GPIO translation table M5Stack / M5Core2
Information about various M5Stack products.
Code examples
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