Can Wei using Channel Sounding to estimate distance without ble connection, just use the advertising?https://devzone.nordicsemi.com/f/nordic-q-a/116946/can-wei-using-channel-sounding-to-estimate-distance-without-ble-connection-just-use-the-advertisingHi, I read the document and samples of Channel Sounding for estimate distance, they are working base on the ble connection. Imagine a scenario, if there are hundreds client need to estimate distance, the host must manage all those connection, it&#39;sen-USTelligent Community 13Wed, 04 Dec 2024 07:45:59 GMTRE: Can Wei using Channel Sounding to estimate distance without ble connection, just use the advertising?https://devzone.nordicsemi.com/thread/513344?ContentTypeID=1Wed, 04 Dec 2024 07:45:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:22ba2f2b-ddda-48a1-a86d-c8a7d1746d72Simonr<p>Hi</p> <p>Before a measurements, devices need to pair and establish an encrypted LE-ACL connection. More details on this can be found in the technical overview blog post here:&nbsp;<a href="https://www.bluetooth.com/blog/bluetooth-channel-sounding-a-step-towards-10-cm-ranging-accuracy-for-secure-access-digital-key-and-proximity-services/">https://www.bluetooth.com/blog/bluetooth-channel-sounding-a-step-towards-10-cm-ranging-accuracy-for-secure-access-digital-key-and-proximity-services/</a>&nbsp;</p> <p>So no way to do this as of now. Hundreds of connections was never the optimal use case for BLE applications, and you should probably go for a Mesh network if that is the case, which could use triangulation between devices instead of distance measurement with channel sounding.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>