https://devzone.nordicsemi.com/f/nordic-q-a/128840/long-range-ble-with-nrf54840-rfx2401c-and-an9520-245-ceramic-antenna-cannot-reconnect-automatically-at-long-distancesHello everyone, I&#39;m working on a long-distance communication application (&gt;50m). My hardware is nRF52840, PA/LNA: RFX2401C, ceramic antenna: AN9520-245. I&#39;ve achieved a connection range of 50-75m. The problem is that when I go beyond that rangeen-USTelligent Community 13Fri, 31 Jul 2026 09:03:35 GMThttps://devzone.nordicsemi.com/thread/569724?ContentTypeID=1Fri, 31 Jul 2026 09:03:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d88de3c6-ea90-4fa3-b544-755de4ffacd2Ressa<p>Hi,<br /><br />* Regarding the schematic, C24 cap is too high for BLE band. Basically it is shorting the RF signal for both TX and RX to ground. First remove this cap and see if you see change in behavior.&nbsp;<br /><br /><br /><img src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1785487989537v1.png" alt=" " /><br /><br /><br /><br />Also , if you have access to SA it would be useful to verify that you are having TX signal up to what you are expecting.<br /><br />* Also there is a known anomaly regarding long range , check it to see if that applies to you case (if using Coded PHYs):<br /><a href="https://docs.nordicsemi.com/r/bundle/errata_nrf52840_rev3/page/err/nrf52840/rev3/latest/anomaly_840_191.html">[191] RADIO: High packet error rate in BLE Long Range mode • nRF52840 Revision 3 Errata • Technical Documentation<br /></a><br /><span>Regarding firmware:&nbsp;please specify more details if the issue still persist after applying above comments. Like which PHY and what advertisement parameters are used. Or just share the your project code, I will check the details.&nbsp;<br /><br /><br /></span>Br,<br />Ressa<br /><br /><br /><br /></p><div style="clear:both;"></div>