low_power_pwm_stop does not work increasing the consumption by 200 uA

[Esteban Gutiérrez Correa]

Hello to all

I'm working in an application that needs to be completely power optimized. In this program the device works as a scanner that if it finds an specific device then puts a pwm in a pin, I already got this working with a low_power_pwm. The problem is that when the power_manage function is working, i.e, when the device is almost asleep, the consumption is 240uA, I managed to track 200 uA of this due to the low_power_pwm being activated, tried to use low_power_pwm_stop but didn't work it just keep the pin in a 100% duty, tried the solutions posted here, didn't work. The last thing I tried was sd_power_system_off but without an external wake up call it just stays in deep sleep and I believe even if this woke up with a timer, it wouldn't be a good option for my application. Appreciate any help you can give me, thanks :)

[Sigurd]

How about setting the duty cycle to 0%, and then turn it off?

     uint32_t error_code;
    error_code = low_power_pwm_duty_set(&low_power_pwm_2, 0);
    APP_ERROR_CHECK(error_code);
    error_code = low_power_pwm_stop(&low_power_pwm_2);
    APP_ERROR_CHECK(error_code);

You could also try to set the pin low manually after you call low_power_pwm_stop() :

nrf_gpio_cfg_output(PIN_OUT );
 nrf_gpio_pin_clear(PIN_OUT );