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This sample is a minimum application to demonstrate basic power management behavior in a basic ADC set up in low power context.


The board should support enabling PM. For a STM32 based target, it means that it should support a clock source alternative to Cortex Systick that can be used in core sleep states, as LPTIM (st,stm32-lptim).

Building and Running

Build and flash as follows, changing nucleo_wb55rg for your board:

west build -b nucleo_wb55rg samples/boards/stm32/power_mgmt/adc
west flash

After flashing, the console shows the ADC measurement in the form: ADC reading[0]: - adc@50040000, channel 3: 1158 = 932 mV

PM configurations

By default, CONFIG_PM_DEVICE and CONFIG_PM_DEVICE_RUNTIME are enabled. On STM32WB, we can observe a power consumption of about 25µA with both kconfig enabled, 27.5µA without (each time with CONFIG_PM enabled).