https://devzone.nordicsemi.com/f/nordic-q-a/41361/minimize-esb-latency-on-nrf52832Hello, we are experimenting with proprietary RF transmissinon between two nRF52832 devices. We are currently trying out the esb_ptx and esb_prx examples, toggling GPIOs on `NRF_ESB_EVENT_TX_SUCCESS` and `NRF_ESB_EVENT_RX_RECEIVED` events. The time fromen-USTelligent Community 13Mon, 10 Dec 2018 12:58:38 GMThttps://devzone.nordicsemi.com/thread/160988?ContentTypeID=1Mon, 10 Dec 2018 12:58:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f7d83f0-f77f-4597-a780-c3d578cbf364H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>At the time of uploading a packet to the FIFO, the radio will use&nbsp;130 us to start up (for legacy reasons, nRF51 and nRF24L-series devices have this restriction), and then it goes actively into transmitter mode, where sends x amount of bytes on your desired data rate.</p> <p>Once the payload is received on the PRX side, it will switch over the TX mode to transmit an ACK on-air.</p> <p>A 32 byte payload on 2 MBIT will take approx: 130 us ramp up + (32 + 5 byte address + 2 byte crc + 1 byte preamble + 9 bit PCF field) * 4 us = ~294 us</p> <p>Then the ACK, which we assume has no payload: 130 us + (5 + 2 + 1 + 9 bit)&nbsp; *4 us = ~166 us</p> <p>&nbsp;</p> <p>If you need to time-sync two devices, this blog post can be interesting for you:</p> <p><a href="https://devzone.nordicsemi.com/b/blog/posts/wireless-timer-synchronization-among-nrf5-devices">https://devzone.nordicsemi.com/b/blog/posts/wireless-timer-synchronization-among-nrf5-devices</a></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>