Hi there,
I'm currently using the nRF52 DK (PCA10040) and nRF5 SDK 17.1.0.
Our device needs to permanently connected to a battery, only wake up on a button press and then execute the code. Before the button is pressed, nothing needs to be done (no advertising, etc.). I have read a lot about SYSTEM_ON and SYSTEM_OFF and I realized SYSTEM_OFF is not suitable for this application (since it will reset the chip and start execution from scratch).
That is why I tried using sd_app_evt_wait(), but this does not work at all. It seems that sd_app_evt_wait() returns immediately.
Here is my code:
static void permanent_sleep()
{
ret_code_t err_code;
// configure Button 4 with SENSE enabled
nrf_gpio_cfg_sense_input(BSP_BOARD_BUTTON_3, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);
NRF_LOG_INFO("Going to sleep...");
// enter sleep mode
err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Woke up...");
}
int main(void)
{
bool erase_bonds;
uint32_t err_code;
// Initialize.
log_init();
timers_init();
buttons_leds_init(&erase_bonds);
power_management_init();
// enter sleep mode
permanent_sleep();
// remaining code should be executed from here
}
Any idea why this is not working? Most examples I have looked at use idle_state_handle() -> pwr_mgmt_run() within the main loop, but this does not work for me because advertising would need to be started before that.
I'm grateful for any hints how to fix this!
