Upgrade to DFU UART bootloader using DFU BLE bootloaderhttps://test-devzone.nordicsemi.com/f/nordic-q-a/88837/upgrade-to-dfu-uart-bootloader-using-dfu-ble-bootloaderHello, Our board consists of an STM32 microcontroller as the main core and an nRF52 as the BLE module. In fact, we have older products on the market that support DFU BLE. We will launch a new product soon, but this time we decided to use the DFUen-USTelligent Community 13 Non-ProductionMon, 13 Jun 2022 11:17:25 GMTRE: Upgrade to DFU UART bootloader using DFU BLE bootloaderhttps://test-devzone.nordicsemi.com/thread/372108?ContentTypeID=1Mon, 13 Jun 2022 11:17:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:16ccefe3-ae8b-4859-8f9f-3e0ed07ea720user15146<p>Hi,</p> [quote user=""]My question is: can we upgrade the bootloader (in our old products) from a bootloader that supports DFU BLE to a bootloader that supports DFU UART Wirelessly ?[/quote] <p>Should be fine as long as you can fit the new bootloader in the space that is allocated for the bootloader you have now. I.e. if you don&#39;t need to change the bootloader start address to make room for the new bootloader, it should work fine.</p><div style="clear:both;"></div>