https://devzone.nordicsemi.com/f/nordic-q-a/16547/guarantee-ota-dfuHello. I&#39;d like to know. Can I trust to opportunite to firmware my controller (nrf52832) over the air. I mean is there any chance do not be able to do it, for example if last firmware was fault or not correct or something else. How much the OTA DFU mechanismen-USTelligent Community 13Wed, 21 Sep 2016 09:05:16 GMThttps://devzone.nordicsemi.com/thread/63311?ContentTypeID=1Wed, 21 Sep 2016 09:05:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e929941b-34e1-4f79-8eda-f5cc97ececacbjorn-spockeli<p>Hi Stas,</p> <p>I suggest that you take a look at our BLE bootloader documentation on Infocenter found <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/examples_ble_dfu.html?cp=4_0_1_4_3_1">here</a>. Our Dual-Bank bootloader ensures that you never delete the old application before you have verified that the new application has been correctly received. You can read more about it on <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/bledfu_memory_banks.html?cp=4_0_1_4_3_1_3_2">this</a> Infocenter page.</p> <p>-Bjørn</p><div style="clear:both;"></div>