https://devzone.nordicsemi.com/f/nordic-q-a/33880/are-ota-updates-possible-on-non-connectable-beaconsWe are working on non connectable beacons without any external I/O. They simply have a power and ground. Is it possible to perform OTA updates on such devices. Is there any way to trigger bootloader mode without any connection/external trigger ?en-USTelligent Community 13Mon, 30 Apr 2018 07:34:46 GMThttps://devzone.nordicsemi.com/thread/130226?ContentTypeID=1Mon, 30 Apr 2018 07:34:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0ab0bfbd-6b53-40c1-a639-a7396be459e1Einar Thorsrud<p>Hi Siddhesh,</p> <p>You need <em>some</em> way to trigger the bootloader to enter DFU mode. This could be accomplished by asserting a pin by pressing a button during power up, but as you write you don&#39;t have any external I/O I assume that is not an option. Then the other alternative is to send a command over the air.</p> <p>There are a few ways you could send data to your beacon over the air, but the typical would be to use connectable advertising, allowing a central (phone or similar) to connect and initiate the DFU process. The SoftDevice do not support simultaneous connectable advertising and non-connectable advertising, through, which would perhaps have been the most obvious solution. An alternative is to reconfigure advertising regularly, switching between non-connectable advertising (acting as a beacon), and using connectable advertising (for administration, such as DFU). This is similar to what is done in <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_es.html?cp=4_0_0_4_1_2_9">Eddystone</a>.</p> <p>The&nbsp; <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_buttonless_dfu.html?cp=4_0_0_4_3_1">Buttonless DFU Template Application</a>&nbsp;demonstrates how you can trigger DFU mode over BLE in a connection.</p><div style="clear:both;"></div>