https://devzone.nordicsemi.com/f/nordic-q-a/104087/nrf-connect-sdk-v2-0-0-nrf52833-direction-finding---aoa-mode-4-antsI am currently conducting experiments on direction finding using two nRF52833, one TX and the other as RX . RX employs a 4PST (4-pole single-throw) RF switch for antenna switching. The logic for controlling the RF switch is achieved by toggling betweenen-USTelligent Community 13Tue, 26 Sep 2023 06:58:43 GMThttps://devzone.nordicsemi.com/thread/447628?ContentTypeID=1Tue, 26 Sep 2023 06:58:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:49577dc2-b4ab-47bf-a500-06fab6f61765Kenneth<p>I suggest you sit and try out with different settings here. It should be easy to compile and observe the results on the pins in question, just make sure to do a pristine build (or delete build folder) when doing changes in the dts or overlay file, since the toolchain may not allways catch that these has changed since previous build. To answer your questions:</p> <p>You can use whatever pins you want, I assume if you only have 4 antennas then 2 pins should be sufficient to choose any of the antenna: 0x0, 0x1, 0x2 and 0x3 will be the pin pattern used to select an antenna by the 2 pins in such case.&nbsp;</p> <p>Also check out:&nbsp;<a href="https://infocenter.nordicsemi.com/topic/nwp_036/WP/nwp_036/intro.html">https://infocenter.nordicsemi.com/topic/nwp_036/WP/nwp_036/intro.html</a>&nbsp;</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/447529?ContentTypeID=1Mon, 25 Sep 2023 14:13:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ef64ed3-8737-4629-b281-575b3cae9dffHSUAN<p><span>1.&nbsp; Can I use gpio 3, 4, 28, 29, with two of them controlling my 4PST RF SWITCH, without the need to modify other settings? (other than set &quot;dfe-antenna-num to 4&quot;)</span></p> <p><span>2.&nbsp;&nbsp;Does having four antennas mean I need more than four &quot;antenna patterns&quot;?</span></p> <p><span>3.&nbsp;&nbsp;Does each antenna pattern from 0 to F represent a specific beamforming direction?</span></p> <p>thanks for your help!!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/447451?ContentTypeID=1Mon, 25 Sep 2023 11:33:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:890b59c0-8a12-43f1-ac2c-7e48f2da5bbbKenneth<p>Hello,</p> <p>Looking at the picture you shared of your antennas I can see that this will not work well. It&#39;s very important that all antennas are 100% locked in distance and placement, so we recommend PCB antennas soldered directly to the PCB. Also, with only 4 antennas you will not get accurate results.</p> <p>If you only have 4 antennas you need to set dfe-antenna-num to 4 (instead of 12), and you need to update the antenna pattern to fit with how the gpios can enable each individual antenna, ref:&nbsp;<br /><a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/direction_finding_connectionless_rx/README.html#antenna-patterns">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/direction_finding_connectionless_rx/README.html#antenna-patterns</a></p> <p>Kenneth</p><div style="clear:both;"></div>