../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c:163:19:HAL_PWREx_ControlVoltageScaling 7 ../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c:282:6 ...
Use the 6-pin ICSP header on Arduino Nano (best reliability): ICSP Header Location on Nano: ┌─────────────────────────────┐ │ ┌──┬──┐ │ │ │ │ │ ← = Pin 1 ...