https://devzone.nordicsemi.com/f/nordic-q-a/77730/in-standard-sdk-17-0-2-is-it-possible-to-know-which-devices-did-i-accidently-disconnect-interactive-command-s140-nrf52840In standard sdk 17.0.2 is it possible to know which devices did i accidently disconnect?(Interactive command s140) for example my central is the interactive command app and the Peripheral has N for example lots of light switch and oneen-USTelligent Community 13Mon, 26 Jul 2021 01:48:24 GMThttps://devzone.nordicsemi.com/thread/321665?ContentTypeID=1Mon, 26 Jul 2021 01:48:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8575d875-a59d-429d-9cce-cac8589326f2yu1998<p>nah I just call the connected_devices func to check</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/321384?ContentTypeID=1Thu, 22 Jul 2021 13:46:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ad6d429-c49c-455a-ab4d-0e7621123434Simonr<p>Hi</p> <p>Yes, if you have the connection handles of the connected devices, you can then find out which one was disconnected (by accident) by finding which one was missing. Our <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ble_sdk_app_multilink.html">ble_app_multilink_central </a>example project in the SDK has an example of how this can be done. See the BLE_GAP_EVT_DISCONNECTED event in that example for details. You can also check out<a href="https://devzone.nordicsemi.com/f/nordic-q-a/27371/how-to-map-a-gap-event-to-a-physical-device"> this case</a> where this has been discussed before.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/321215?ContentTypeID=1Thu, 22 Jul 2021 02:00:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:792ff1a8-1ff8-426c-b7f5-5be5f7656ee8yu1998[quote userid="99836" url="~/f/nordic-q-a/77730/in-standard-sdk-17-0-2-is-it-possible-to-know-which-devices-did-i-accidently-disconnect-interactive-command-s140-nrf52840"]<p><span>one of those light switches accidentally disconnected (maybe crashes or smth)</span></p> <p><span>so how can I know which light switch is disconnected&nbsp;</span></p> <p><span>as in mac address</span></p>[/quote] <p><a href="https://devzone.nordicsemi.com/members/simonr">Simonr</a> i mention here</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/321214?ContentTypeID=1Thu, 22 Jul 2021 01:59:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d3a0f4be-331d-4056-8b0c-6846607aeb5cyu1998<p>no i mean&nbsp;<span>accidentally disconnected how can i know which device accidently disconnected as mac address . not by the user drop the device on interactive command</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/321135?ContentTypeID=1Wed, 21 Jul 2021 13:06:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7910a4ca-123e-4857-89e2-26a613747be7Simonr<p>Hi</p> <p>You should be able to use the connection handle to know what device was connected, and you should be able to detect when it&#39;s disconnected. The Connection handle is a unique identifier for everything on one connection. Once you ask the GAP layer to initiate connection you&#39;ll get the connection handle with MAC address, device name, etc.&nbsp;</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>