nRF Util v6.1.0

nRF Util

The nRF Util application is a Python package and command-line utility that supports Device Firmware Update (DFU) and cryptographic functionality.

The nRF Util application and its library has the following features:

There are two different DFU package formats:

The DFU package format transitioned from legacy to modern in nRF5 SDK v12.0.0. Depending on the SDK version that you are using, select a compatible release of this tool:

Note: To create firmware images compatible with nRF SDK 12.0 to nRF SDK 15.0, use the --no-backup command when generating DFU settings.

See the DFU bootloader and BLE Secure DFU Bootloader example in the SDK documentation for more information about DFUs.