POWER_STATE_DEEP_SLEEP never wake up on some devices

[Andreas]

Hello,

I use this code for system_off on a nrf52840 custom board.

const struct device *button = device_get_binding("GPIO_0");
gpio_pin_interrupt_configure(button, SW0_GPIO_PIN, GPIO_INT_EDGE_RISING);

nrf_gpio_cfg_input(SW0_GPIO_PIN, NRF_GPIO_PIN_NOPULL);
nrf_gpio_cfg_sense_set(SW0_GPIO_PIN, NRF_GPIO_PIN_SENSE_LOW);
pm_power_state_force(POWER_STATE_DEEP_SLEEP_1);

Its working good on some prototypes but after some days, few boards didn't wake up anymore.
Only after reset they wake up but the Interrupt stops working.
Does someone have an idea?

[Kenneth]

Its working good on some prototypes but after some days, few boards didn't wake up anymore.

How do you verify that they are in sleep mode and not for instance stuck in code somewhere else (e.g. assert)? Are you able to measure the current consumption in this state?

Keneth