SerialUSB cause memory leak after LowPower.sleep(), using ArduinoLowPower lib. samd21 cpu #293
Description
Every wakeup causes some memory loss, eventually causing CPU reset. However if USB is not plugged in, no memory is lost.
using USBDevice.detach(); and USBDevice.attach();, open/close port does not help.
Using samd version 1.6.17
Test RAM memory usage via:
extern "C" char *sbrk(int i);
int FreeRam (void)
{
char stack_dummy = 0;
return &stack_dummy - sbrk(0);
}