Raytac NRF52840 Upload Bootloader via USB

[mehdi443]

Hi there,

I'm developing a custom board that integrates a NRF52840 based BLE module from Raytac. I was wondering if it is possible to upload the Adafruit nrf52 bootloader via USB without the need of any SW pins or special programmer. Raytac modules come without any bootloader inside.

[Marjeris Romero]

Hi,

If there is no bootloader in the nRF52840 from before (in which case you could use serial DFU using USB) you will need access to the SWD pins and a programmer to program the chip.

Best regards,

Marjeris