https://devzone.nordicsemi.com/f/nordic-q-a/13318/scanner-observerHi Team, In current application, each BLE node (nRF51x22) need to switch between Broadcaster and observer roles . Beacon kind of behavior is required i.e. no connection. Which softdevice is to be used in this case? As per me S130 is the matchen-USTelligent Community 13Tue, 19 Apr 2016 11:41:25 GMThttps://devzone.nordicsemi.com/thread/50765?ContentTypeID=1Tue, 19 Apr 2016 11:41:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01501025-2166-4508-a3cd-32546a25d648Artucas<p>Some time ago i tried to do exactly what you want. These links might help you:</p> <p><a href="https://devzone.nordicsemi.com/question/54017/scan-for-other-devices-using-nrf51422-pca10028/">Scann for other devices</a><br /> <a href="https://devzone.nordicsemi.com/question/54624/how-to-advertise-for-less-than-one-second-with-nrf51422/">Advertise for less than one second</a></p> <p>If you can use S130 stack, use it. That will allow to do both - advertise and scann. You could achieve the same result with S110 by using timeslot API, but that would require to put a lot more effort. You can read about other ways here:</p> <p><a href="https://github.com/NordicSemiconductor/nRF51-multi-role-conn-observer-advertiser/tree/0f96074a42a531ca4747b016c74010af2210fa18/observer">multi-role-observer-advertiser</a><br /> <a href="https://devzone.nordicsemi.com/question/48110/nrf-beacon-with-scanning-feature/">beacon-with-scanning</a><br /> <a href="https://devzone.nordicsemi.com/question/35604/nrf51822-ble-s110-scan-another-device-get-rssi-value/">S110-scan-another-device</a></p><div style="clear:both;"></div>