Current consumption - nRF9161

RE: Current consumption - nRF9161

rajeev — Fri, 26 Jul 2024 02:49:58 GMT

Disabling serial RX helps to reduce power therefore 3.63 uA sounds pretty good.

How much lower do you want? In that case, maybe find a way to shut off the nRF9161 to get lower, which is then wake on GPIO by an external interrupt.

RE: Current consumption - nRF9161

hk — Wed, 24 Jul 2024 22:35:16 GMT

Hello,

Thank you for your reply. With that in mind, I made the following code with the following settings in prj.conf.

int main(void)
{
	int ret = nrf_modem_lib_init();
    if (ret) {
        printf("ERROR: Modem library initialization failed (%d)", ret);
        return ret;
    }

	printf("Input sample started\n");

	while(1){
		k_cpu_idle();
	}

	return 0;
}

prj.conf

CONFIG_LOG=y
CONFIG_LOG_MODE_MINIMAL=y

CONFIG_INPUT=y
CONFIG_INPUT_EVENT_DUMP=y

CONFIG_NRF_MODEM_LIB=y
CONFIG_SERIAL=y
CONFIG_INPUT_GPIO_KEYS=n

With CONFIG_SERIAL=n I got a value of 3.63 uA while with CONFIG_SERIAL=y I got a value of 603mA. Is it possible to get a lower value?

I still don't understand where I change the GPIOE to event mode.

RE: Current consumption - nRF9161

Charlie — Wed, 24 Jul 2024 13:44:01 GMT

Hi,

You may refer to the following case:

Level-triggered GPIO interrupt with NCS 2.7 on nRF9160

Just need to change the GPIOE to event mode.

Best regards,

Charlie