Arduino for STM32

You should redefine the system core clock config to properly configure the pll vs the HSE value.

Pay attention it seems you set 80MHz and not 8MHz

Is the LED_BUILTIN correct for this new board?

https://github.com/stm32duino/Arduino_C ... adaptation

https://github.com/stm32duino/Arduino_C ... efinitions

So simply create the file with at sketch level :
#define HSE_VALUE 800000000U

Simply redefine HSE_VALUE using hal_conf_extra.h.
See the wiki.

Your best bet is to debug to see where it fails.

You should use the official SDFat library from Bill Greiman.
https://github.com/greiman/

We made some fixes within the 2.7.1 core version and works as expected.

Note that the measure is done on IDD. So only the MCU consumption is measured.

Hi, deepsleep (stop mode) works as expected. I've tested with a Nucleo F401RE, I've got something close to your value (3 mA when the LED is OFF). Anyway, you probably have to ensure all unused pins are set to Analog Input and the respective GPIO port clock disabled. The library can't do that for you...

This is a known issue and fixed in the repo. You can find a workaround in the related issue.
https://github.com/stm32duino/Arduino_C ... /pull/2294