Update firmware via BLE xiao nRF52840 sense

Leo_Zhu · November 17, 2025, 11:26am

I want to update firemare to XIAO nRF52840 sense via BLE, is it possible to achieve? If that, any guide or code example that I can follow and try? Thanks~

PJ_Glasso · November 17, 2025, 3:55pm

Hi there,

Yes,Yes indeed… It’s called DFU via OTA The device firmware update , over the Air.
There are many examples of DFU over BLE , the Nordic DFU has mobile app. Look to those tutorials.

HTH
GL PJ

Leo_Zhu · November 19, 2025, 5:52am

so it should be secure DFU bootloader of Nordic SDK not UF2 of Adafruit bootloader? update Bootloader is necessary?

PJ_Glasso · November 19, 2025, 5:41pm

Hi there,

So , Yes if you want secure bootloader and DFU You’ll be using the MCUBoot
bootloader. Check this to get the Idea.

HTH
GL PJ