Advertising after DFU

RE: Advertising after DFU

Ken A — Fri, 26 Jun 2020 17:02:19 GMT

This gets more confusing.

I stripped out all unnecessary code, and the problem remains.

It is running on the nRF52840 DK board and I am looking at the disconnect/connect issue, ignoring DFU for now.

The last code I want to remove is for USB. The application requires a USB UART. If I do not initialize USB prior to initializing the softdevice, the function nrf_sdh_enable_request() will fail.

RE: Advertising after DFU

Edvin — Fri, 26 Jun 2020 10:54:46 GMT

In both cases, perhaps there is some application error that stops the device directly after the advertisement is started? Have you tried to debug and see what happens? Is the error handler catching something? Does the log say something? If you use a fairly new SDK, the log should say if one of the APP_ERROR_CHECK() catches something.

Is there some way for me to reproduce your issue on an nRF52840 DK?

RE: Advertising after DFU

Ken A — Thu, 25 Jun 2020 18:03:37 GMT

ble_advertising_start returns NRF_SUCCESS in both cases.

Here is another odd behavior. If I connect to the device from the nRF Connect app, and then disconnect, and rescan for devices, the device is no longer advertising.

RE: Advertising after DFU

Edvin — Thu, 25 Jun 2020 13:53:09 GMT

[quote user="Ken A"]the application runs normally (except for not advertising in the second method).[/quote]

So it doesn't run normally, then.

Why is it not advertising? Does ble_advertising_start return NRF_SUCCESS?

RE: Advertising after DFU

Ken A — Thu, 25 Jun 2020 13:43:49 GMT

In both cases, after the DFU is complete, the application runs normally (except for not advertising in the second method).

RE: Advertising after DFU

Edvin — Thu, 25 Jun 2020 12:58:45 GMT

Have you tried to debug the issue? After the application is updated using the second method, is the application started at all, or is it stuck in the bootloader?

If you enable logging, do you see any logging from the application? If you try to use the pca10056_s140_ble_debug bootloader project instead of the pca10056_s140_ble project, does the bootloader indicate that the application should start, or is it stuck somewhere in the bootloader? You can monitor the log from the bootloader if you use the ..._debug project.

Best regards,

Edvin