Hello,

To check power consumption in sleep mode on the STM32WB custom board, you can use a current measurement tool such as a multimeter or an oscilloscope with a current probe.

Here are the basic steps to follow:

1. Measure the current consumption of the board in active mode using the current measurement tool. This will give you a baseline current consumption value.
2. Put the board into sleep mode using the appropriate power management functions. The specific functions will depend on the software development environment you are using (e.g. STM32CubeIDE, Keil, etc.), but they typically involve setting the appropriate bits in the power management registers.
3. Measure the current consumption of the board in sleep mode using the current measurement tool.
4. Compare the current consumption values in active and sleep modes to calculate the power savings achieved in sleep mode.

Note that there are different levels of sleep modes, each with different levels of power savings and wake-up times. You should choose the sleep mode that provides the appropriate balance between power savings and wake-up time for your application.

Also, keep in mind that the power consumption of the board may vary depending on the specific components and peripherals that are active or disabled during sleep mode. You may need to adjust the power management settings and repeat the measurements accordingly.

Thank You