https://devzone.nordicsemi.com/f/nordic-q-a/3192/can-any-bootloader-on-the-air-be-implemented-with-s120In my opinion, S120 can only acts as central role and can not be discovered by bootloading sponsor which is usually a PC program. More development work is needed if bootloader on the air is based on S120. I have to write a dedicated ble app using S110en-USTelligent Community 13Tue, 07 Oct 2014 09:12:44 GMThttps://devzone.nordicsemi.com/thread/11734?ContentTypeID=1Tue, 07 Oct 2014 09:12:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f7e40069-e9b4-4479-8160-ef317b964782Petter Myhre<p>Please see <a href="https://devzone.nordicsemi.com/question/6746/s120-bootloader/">this</a> question.</p><div style="clear:both;"></div>