https://devzone.nordicsemi.com/f/nordic-q-a/9514/nrf51822-esb-rx-and-tx-mode-enable-and-disable-timesI have a custom board with the nRF51822 chip, the chip is set-up with the recommended (CFAC WLCSP schematic with low voltage mode) setup, excluding the external low frequency clock, according to the [nRF51822_PS v3.1]. In this product specificationen-USTelligent Community 13Fri, 02 Oct 2015 07:49:13 GMThttps://devzone.nordicsemi.com/thread/35135?ContentTypeID=1Fri, 02 Oct 2015 07:49:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:39895a38-4572-42d6-baeb-68a9b4c91b91H&#229;kon Alseth<p>Hi,</p> <p>The ESB library provided in our SDK is synchronous under-the-hood, which means that each operation is performed based on a &quot;tick&quot; (set by your nrf_esb_set_retransmit_delay() function), which can cause such delays. In addition, the ESB protocol is run in software, so for each packet, the cpu needs to parse and verify its content.</p> <p>We also have provided a micro-esb library, which is open source here: <a href="https://github.com/NordicSemiconductor/nrf51-micro-esb">github.com/.../nrf51-micro-esb</a></p> <p>Using this protocol, you have more control over the radio protocol and you can enable/disable it much faster.</p> <p>Best regards, Håkon</p><div style="clear:both;"></div>