https://devzone.nordicsemi.com/f/nordic-q-a/108735/adc_read-returning--eagainHi, I am getting started with the 52840DK board and v2.5.0 of the nRF SDK. I have successfully run ADC and Timer examples, but am running into an issue trying to combine the two so that the ADC reads, on P0.02(AIN0) and P0.03(AIN1), occur within theen-USTelligent Community 13Wed, 28 Feb 2024 12:32:20 GMThttps://devzone.nordicsemi.com/thread/471283?ContentTypeID=1Wed, 28 Feb 2024 12:32:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:68adb1eb-78a1-4552-8283-d4bc59e6d6cdJ&#248;rgen Holmefjord<p>Hi,</p> <p>Do the function call work correctly if called from main() or another non-interrupt context? The issue might be that the timer handler runs in interrupt context, and you are calling a blocking function that depends on other interrupts in lower layers.</p> <p>Have you debugged/stepped the application to see where the error code comes from? My guess would be that it comes from k_sem_take() in <a href="https://github.com/nrfconnect/sdk-zephyr/blob/main/drivers/adc/adc_nrfx_saadc.c#L353">adc_context_wait_for_completion</a>() because it timed out waiting for the semaphore from the SAADC interrupt handler.</p> <p>Do you need to use a TIMER peripheral with interrupts to trigger the sampling, or could you use a separate Thread to trigger this? If you are only sampling every 5 seconds, this should likely be accurate enough.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>