@Andrzej-Sailing Thank you for Sharing!!! this helped me tremendously!

Hello @alcor

please have a look at the schematic.

With external 5 V you can power the M5Stack Gray either through the IO Port or the Bus Port. Use pins 5 V and GND (G).

No, when powering the M5Stack with external 5 V, the battery will not be charged as this bypasses the TP5306 charger IC.

Thanks
Felix

Thanks @teastain,

i try it since few days, but i can't find any information how i must connect the Motor Modul.

I use this one: Link

Have you an idea how i must connect ENA (for PWM), IN1 and IN2 with the M5stack core and set the motor speed with PWM?

Hi all!

I figured I'd update this thread with my findings. I've been running a unit in my non-insulated plastic shed for two months of Canadian winter with no problems whatsoever. The screen turned on immediately and is perfectly fine. No unexplained lockups, reboots, or other glitches.

It has been a relatively warm winter (unfortunate for my testing). Inside the shed, it got down to -15C one weekend, but for the rest of the time, it has been between 0C and -6C. Humidity has been an average of 78% with a peak at 97%.

Can confirm the m5stack core2 aws iot edukit edition suffers this same behavior.

I don't trust myself to do the tiny soldering, this is incredibly disappointing.

Hello @jsolo12345

the reset button only restarts the ESP32. The EEPROM is emulated on most devices *) and simply a part of the flash. In other words, no, the content of the EEPROM is not deleted when the reset button is pressed. It gets erased however when the flash chip is erased, but then the program is gone as well.

*) M5Paper is an exception as it actually has a dedicated EEPROM IC.

Thanks
Felix

This worked for me... https://community.m5stack.com/topic/3861/solved-importerror-no-module-named-m5stack_ui

@calvorotas I'm having similar issues. What is that "adjust all pins" about? Did you had any bent pins?

My 15x2 looks good, but I'm unsure what does "adjust" mean and maybe I have to do something.

Thanks!

@felmue thank you Felix, that is very helpful and explains. Will check out other pin. Thanks!

@felmue thank you very much for your help!

i fixed it now turned out the cable cracked while setting evrything up. so it just didnt see the second engine anymore.

@m5stack
Thank you. Now it works.

Mon

Hello @antimix

I see the same on my M5Stack (Gray) - when I turn it off manually I still measure about 2 V on the Groove port.
In contrast when I do the same with an M5Core2 the Groove port is properly turned off when M5Core2 is turned off.

Since there is no full schematic for the M5Stack (Gray) it's hard to tell why the Groove port isn't fully turned off and if there is a way to really turn it off.

BTW: even with the Groove port not fully turned off the battery should not have been depleted completely as the battery has a built-in protection circuit which in theory should prevent under- or overvoltage.

Thanks
Felix

Hello Felix,

thanks for the info on your M5Stack tuning. I opened the case and managed to get to the MPU9250 however, I am quite sure that I would burn something considering the tools I have. I took a photo of the MPU9250 with the 1.5mm Allen key next to it just to give an impression of size.
0_1619535245194_WIN_20210427_15_28_44_Pro.jpg I have purchased some ADXL355Z and will try a "conventional" solution. BTW, to open the case I followed the instructions given here (https://forum.m5stack.com/topic/257/replace-cracked-screen/6).

Cheers,

SpeedyG