For a new series of scientific sensors I decided to use the nRF52840. I ported my Embedded File System (JesFs) to the Serial Flash on the DK ('pca10056').
Together with the JesFs Bootloader it allows very easy and reliable Firmware Updates over many different pathes, such as BLE, Mobile Internet, UART, USB...
Maybe it might be useful for others too. Feel free to use it.Jo
Links / Doku:JesFs: https://github.com/joembedded/JesFsJesFs_Bootloader: https://github.com/joembedded/JesFs_Bootloader