https://devzone.nordicsemi.com/f/nordic-q-a/55076/during-the-ota-dfu-attempt-the-bootloader-cannot-be-woken-up-because-the-device-is-not-rebootedI&#39;m developing a wearable device using nRF52832. I am developing OTA-DFU nowadays. I have successfully tested the buttonless OTA-DFU using the nRF52-DK. And I&#39;m testing on my custom board and I have one problem. My custom board has a soft power buttonen-USTelligent Community 13Sun, 01 Dec 2019 22:55:22 GMThttps://devzone.nordicsemi.com/thread/222920?ContentTypeID=1Sun, 01 Dec 2019 22:55:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e23eb2dc-fb09-46c9-b526-716eddd77d0cTurbo J[quote userid="7079" url="~/f/nordic-q-a/55076/during-the-ota-dfu-attempt-the-bootloader-cannot-be-woken-up-because-the-device-is-not-rebooted"]V is supplied to the nRF52832 through the LDO, and the nRF52832 holds the LDO through one GPIO. It keeps the power supply.[/quote] <p>The bootloader MUST do the same. Just add the corresponding line in the bootloaders main.c source file. You must do this pretty early, otherwise the LDO will turn off.</p> <p>Now between the NVIC_SystemReset() and the bootloader turning on the LDO GPIO pin, the latter will probably be high impedance. You might want to use a capacitor to buffer the signal level a bit - I&#39;d try 100nF first.</p><div style="clear:both;"></div>