High current consumption in system off mode

RE: High current consumption in system off mode

Håkon Alseth — Thu, 05 Mar 2026 14:56:26 GMT

Hi,

Yes, you should set all the GPIOs connected to external devices to their idle state.

For UART, this is usually logic '1'. You can configure the nRF GPIO as input, with pull resistor enabled for instance.

Kind regards,

Håkon

RE: High current consumption in system off mode

Aadhil — Thu, 05 Mar 2026 14:08:32 GMT

My button configuration is shown below,

buttons {

compatible = "gpio-keys";

button0: button_0 {

gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;

label = "Push button switch 0";

zephyr,code = <INPUT_KEY_0>;

};

Since UART is present on my board, should I configure the TX and RX pins as GPIO_OUTPUT_INACTIVE?

RE: High current consumption in system off mode

Håkon Alseth — Mon, 02 Mar 2026 07:24:56 GMT

Hi,

I assume this is your custom board?

Which other logic do you have on your board? It is important that you set the GPIOs connected to external circuitry to its idle state, to avoid floating IOs during sleep.

Kind regards,

Håkon