Nucleo-WL55JC1: STOP2 mode drawing 2mA

[mathi_manoj]

Split from STM32WB55 - Achieve lowest possible power mode.

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I am also not able to achieve Shutdown mode in Nucleo-WL55JC1.
Instead, I tried with STOP2 mode https://github.com/STMicroelectronics/STM32CubeWL/tree/main/Projects/NUCLEO-WL55JC/Examples/PWR/PWR_STOP2_RTC , but it also gives 2mA. Kindly let me know, How can achieve STOP2/Shutdown mode ?. Thanks in advance!

[KDJEM.1]

Hello @mathi_manoj ;

Could you check your measuring device?

I recommend you to follow these steps:

- Debug PWR_STOP2_RTC  example

- Run the example.

- Stop run

- Remove JP1 and all jumpers on connector JP8

- Connect an amperemeter to JP1 to measure IDD current.

- Take the IDD current when the LED2 off:  "system in Stop 2 mode"

Note that when the LED toggles, you are measuring the current in run mode.  

On my side I tested the PWR_STOP2_RTC example and I found that the Stop 2 current consumption is 1.3µA

I recommend you to use STLINK-V3PWR for low power measurement.

Thank you.

Kaouthar