how and when to configure PA LNA enables in the stock BLE DFU firmware in nRF5 SDK 17.1.0

[RVM]

We are using SDK 17.1.0 with SoC nRF52832 and Soft Device S132.

We want to configure the soft device to enable the TX and RX GPIOs to talk to off-chip power amplifier.
Looks like this can only be done after the Soft Device has been enabled but before a client establishes a connection.

In a previous generation of this product we modified the stock SDK file "libraries\bootloader\ble_dfu\nrf_dfu_ble.c" to make this happen before calling the function "advertising_start()".

However we want to have a cleaner mechanism where we do not modify files in the SDK (or maintain a modified copy elsewhere).

I tried doing so in the DFU observer call back but if I do so in either of the events 'NRF_DFU_EVT_DFU_INITIALIZED' or 'NRF_DFU_EVT_TRANSPORT_ACTIVATED' I get the error 'INVALID_STATE'.

Is there a way to register a callback that will be executed after the Soft Device is enabled and just prior to the first advertisement, but before any DFU clients connect to the device?

Cheers

RMV

[Sigurd Hellesvik]

Hi RMV,

Our experts on the issue are out of office this week due to vacation.

However, they are back next week.
We will get back to you about this case during next week.

Thank you for your patience!

Regards,
Sigurd Hellesvik

[Vidar Berg]

Hi,

Unfortunately, as there are no observer events between the Softdevice being initialized and advertising start, you will still have to keep a modified version of the nrf_dfu_ble.c to make this work.

Best regards,

Vidar