The SoftDevice Firmware is a Bluetooth protocol stack developed by Nordic Semiconductor to support Bluetooth Low Energy (BLE) communication. Each SoftDevice Firmware version has a unique identifier called the SoftDevice ID.

The SoftDevice Firmware ID version list is not public. We need to fill it in when using DFU's OTA, so we need to know the SoftDevice ID.

The "nRF52832" as an example, find the s132_nrf52_7.2.0_release-notes.pdf file in the installation directory of nRF5 SDK v17.1.0.

.../nRF5_SDK_17.1.0_ddde560/components/softdevice/s132/doc/s132_nrf52_7.2.0_release-notes.pdf

After opening s132_nrf52_7.2.0_release-notes.pdf, you can find the following SoftDevice ID 0x0101.

Execute the installed "nRF Connect for Desktop" application and click "Open" of the "Programmer" function.

Click "Add file".

Select "Browse..." to load the SoftDevice's hex file.

.../nRF5_SDK_17.1.0_ddde560/components/softdevice/s132/hex/s132_nrf52_7.2.0_softdevice.hex

You can find the following SoftDevice ID 0x0101 in the LOG window.