https://devzone.nordicsemi.com/f/nordic-q-a/12013/details-about-nrf8001Hello, I&#39;m using nRF8001 with Arduino for our project. I use BLEeripheral. h and I need to know if it&#39;s possible with the visibility of NRF when invisible can nrf connect automatically to the phone (central) with a memorized address of centralen-USTelligent Community 13Tue, 23 Feb 2016 07:48:27 GMThttps://devzone.nordicsemi.com/thread/45473?ContentTypeID=1Tue, 23 Feb 2016 07:48:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c91c08d-0de8-4510-bf25-1716bf5a3d97run_ar<p>Some phones, most newer phones can auto reconnect to a bonded peer. Regardless you shoule normaly be able to auto reconnect in your central application. To see how proximity can be used I recommend looking at the proximity application in nRF toolbox.</p> <p>To add a pin code to the bonding procedure you have to configure this in the xml file that is used to generate the services.h setup file. In nrfgo studio, open the configuration file. in the security tab, choose security required and Authenticated as the required level of security. Then configure your IO capabilities (you need a keyboard or display to use MITM (authentication).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/45472?ContentTypeID=1Mon, 22 Feb 2016 22:16:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:67be5599-24fa-4021-a4b1-aaf227d189bfAmineG<p>Can the mobile application remember the nrf connection and connect to it without pressing connect? How to use proximity. How to add a PIN number on the characteristic of the nrf?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/45471?ContentTypeID=1Mon, 22 Feb 2016 09:49:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:421a254c-344c-4d9b-841b-f532ab4d6101run_ar<p>Not sure I understand your questions. When the peripheral is advertising it is visible to all scanners. The peripheral has to advertise for the central to be able to establish a connection.</p><div style="clear:both;"></div>