nRF Connect Bluetooth Low Energy v4.0.0 or later

Updating firmware over the air

If the connected device has Nordic Device Firmware Update (DFU) Service, you can update the firmware on the device.

For more information on the DFU process, see Device Firmware Update process. For DFU bootloader examples, see DFU bootloader examples.

For a device that has DFU Service, Secure DFU appears in the device's list of discovered services and the Start Secure DFU button appears in the list header.

Figure 1. Secure DFU in the list of discovered services
Secure DFU in the list of discovered services

To update the firmware, complete the following steps:

  1. To open the DFU dialog, click the Start Secure DFU button Start Secure DFU button.
  2. Browse and select a DFU zip package file on your computer.
    Important: To create the DFU zip package file, use the nrfutil tool. See the nrfutil documentation for more information.

    Information on the content of the DFU zip package is displayed in the Package info field.

    DFU dialog
  3. To start the transfer of the DFU package to the connected peer device, click Start DFU.
    The progress bar shows the progress of the transfer.
    DFU progress
  4. When the progress bar has reached 100%, click Close.
    DFU completed

To stop the transfer, click Stop DFU. The transfer continues from where it was stopped when you click Start DFU again.

If you click Close before the DFU transfer has completed, a confirmation dialog appears. If you click OK in the confirmation dialog, the transfer is canceled.