how to use Atomic FIFO Lib on softdevicehttps://devzone.nordicsemi.com/f/nordic-q-a/38358/how-to-use-atomic-fifo-lib-on-softdevicehi all, how to use Atomic FIFO Lib on ble stack ? Called nrf_atfifo_get_free() always get NRF_ERROR_NOT_FOUND when ble_peripheral connect to central . In ble_app_uart project use nrf_libuarte_async lib , Atomic FIFO(app_fifo lib that seemen-USTelligent Community 13Mon, 10 Sep 2018 09:19:29 GMTRE: how to use Atomic FIFO Lib on softdevicehttps://devzone.nordicsemi.com/thread/147964?ContentTypeID=1Mon, 10 Sep 2018 09:19:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:66379543-0750-45e4-b197-e56bbf8ed5faEinar Thorsrud<p>Hi,</p> <p>The atomic FIFO library should not depend on the BLE connection state in any way. I would think that the reason for&nbsp;nrf_atfifo_get_free() returning&nbsp;NRF_ERROR_NOT_FOUND&nbsp; is simply that the FIFO is empty? Have you verified with a debugger (for instance using logging) that&nbsp;nrf_atfifo_alloc_put() is being called first? If not, what you see is expected behaviour.</p><div style="clear:both;"></div>