ATOMS3 IMU - wake up device

myscho151

Hi all kind people,

i have AtomS3 and Nb-iot2 module. I am pretty much beginner here, but with assitance of ChatGPT my first project is alive, but have big power consumption 0,061A.

My program: device is on and wifi and ble are off, device is waiting for first move, if move is detected then Nbiot2 turn on, connect, send webhook, turn off the screen and go to the sleep and waiting for the next move from IMU.

But here is my problem: if i use command for deep sleep the device cannot be wake up when is moving.

My goal is something about 6-10mA ---- in theore i want to live one month on 21700 battery.

Can anyone please help me, how can i make the light or deep sleep on device to have lower consumption?

I have all Stamp and Atom and Stick devices and when that will work i want make this project for StamS3.

felmue

Hello @myscho151

I don't think you can wake ESP32S3 from deep or light sleep when IMU is registering movement. Reason: the INT line of IMU in M5AtomS3 is not connected to anything. So I don't see how IMU could signal ESP32S3 to wake up.

Thanks
Felix

myscho151

@felmue thank you very much. Looks you understand my problem, so if i use for example AtomS3 lite or Stamp and i will use external accelerometer - i have both... is way to wake up device? Using of AtomS3 is not neccesary, but i start with this device (because display give me some feedback).

I have this IMU units:

https://shop.m5stack.com/products/6-axis-imu-unitmpu6886?srsltid=AfmBOopYP0BxUe1c-m8CkWPCuHO8tqyQ0TsQsLKVjlZl6HxUFQ6080gP

https://shop.m5stack.com/products/6-dof-imu-pro-mini-unit-bmi270-bmm150-bmp280

Because i find that one have IMU6886 and second BMI270.

But in overall is hard for me find some more infos. Like i fight with NB-iOT2 module to make it work, but AI help me.

felmue

Hello @myscho151

unfortunately both IMU units you linked 'suffer' from the same issue as the IMU internal to M5AtomS3 - the INT line is not connected.

Thanks
Felix

myscho151

@felmue thank you for your time. I am noob about this, but i is big disadvantage :-( i must find some better IMU unit for this project.

felmue

Hello @myscho151

if you have access to a soldering station you could connect the INT line to a GPIO yourself. I've done that for am M5Core2 - please see here.

Thanks
Felix

myscho151

@felmue thank you. But i see you wirite in your post that i can use my M5 Stick (the newest version) - because you write that the Stick have this connection i need?

felmue

Hello @myscho151

you could use an M5StickCPlus - see stock example here.

Thanks
Felix