https://devzone.nordicsemi.com/f/nordic-q-a/60255/about-disconnect-alert-app-when-device-disconnectedHi, We are developing a device which connect to a smart phone and alert the user through smartphone when the device disconnected (out-of-range). So I guess this app should be run in background and trigger the app to wake up/ open the app when disconnecteden-USTelligent Community 13Mon, 20 Apr 2020 14:25:00 GMThttps://devzone.nordicsemi.com/thread/245601?ContentTypeID=1Mon, 20 Apr 2020 14:25:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e665547d-ce1d-404b-b518-81fc9d3210b8Hung Bui<p>Hi Jones,&nbsp;</p> <p>The proximity example in our nRFToolbox app should do something similar. It trigger an alert on the phone when the device is disconnected.&nbsp;<br />The peer (nrf52) should run the ble_app_proximity firmware.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/245082?ContentTypeID=1Thu, 16 Apr 2020 17:21:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01a7a5e2-fe2e-45b8-85dd-32cd0e3fd120Jones<p>i just wonder if nordic already developed related sample app which could let me refer to.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/245066?ContentTypeID=1Thu, 16 Apr 2020 15:32:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c6acb775-1454-4f6c-808d-fa3729b7dcb2awneil[quote userid="8668" url="~/f/nordic-q-a/60255/about-disconnect-alert-app-when-device-disconnected"]Is any example or resources (android) I can refer to ?[/quote] <p>That would be a question for an Android developer forum.</p> <p>It wouldn&#39;t be specific to Nordic.</p><div style="clear:both;"></div>