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nrf_pwr_mgmt_run() with SoftDevice not go to low power

Hello.

I use SDK16 in my project.

Previously when I want to go on sleep I use __WFI(), and get into sleep till interrupt. Because I use The SoftDevice I change the command to nrf_pwr_mgmt_run() as instruct by Nordic . But now it doesn't enter sleep at all. I try also disable the FPU by NRF_PWR_MGMT_CONFIG_FPU_SUPPORT_ENABLED 0 in the sdk_config.h but didn't help.

Why it is so?

Bar.

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