NRF52840 Dongle not working properly

RE: NRF52840 Dongle not working properly

Simonr — Tue, 14 Dec 2021 11:22:43 GMT

I asked one of my colleagues that works with the iOS version of the nRFConnect app, and apparently, the iPhone/iOS caches services, etc. until you do service discovery again. You can try erasing bonding information entirely on the phone side to make sure it's not cached anymore, and then try reinstalling the app and make sure service discovery is being done upon the new connection.

Best regards,

Simon

RE: NRF52840 Dongle not working properly

Ceranthor — Tue, 14 Dec 2021 09:12:47 GMT

I have one more question i made it working but i do not know how to write a new line and all my data is transfered into a single line on serial port i tried 0x0A sign (new line sign) but it did not work

RE: NRF52840 Dongle not working properly

Ceranthor — Mon, 13 Dec 2021 09:31:54 GMT

Now i see that my phone see everything as LBS service, hrs uart etc. Reinstalling app (NRF connect) do not work, the problem is still the same. I use iPhone X. Do you have any advice for this?

RE: NRF52840 Dongle not working properly

Simonr — Mon, 13 Dec 2021 09:04:10 GMT

I see no reason why the LBS service should be part of this project from the main.c file. What SDK example did you base your project on? The ble_app_uart nor the usbd_ble_uart example projects have the lbs service enabled by default.

To make sure that you are connecting to the correct board, can you try changing the Device name on your Dongle, and connect to the new name to check that the lbs service is still present.

Best regards,

Simon

RE: NRF52840 Dongle not working properly

Ceranthor — Fri, 10 Dec 2021 09:01:13 GMT

devzone.nordicsemi.com/.../8611.main.c

With pleasure it took me 9 hours yesterday and still the same problem. There is no ble_lbs_init() in sdk confis LBS is disabled and still it appears.

RE: NRF52840 Dongle not working properly

Simonr — Fri, 10 Dec 2021 08:57:56 GMT

Could you possibly upload the main file or at least a snippet of the main() loop of your application so I can take a look. The service must be called somewhere in your application for. You can try searching your entire project for the ble_lbs_init() function, as that should be the function initializing this service.

Best regards,

Simon

RE: NRF52840 Dongle not working properly

Ceranthor — Thu, 09 Dec 2021 16:13:28 GMT

I have another problem. In this program i want to use dongle as BLE UART with CDC. I changed the example. I can access serial port - this works, i can see in nrf connect as uart - this works. In attribute table i see this as Led and button service what is strange i disabled it and there is no functions in my code to enable them.

RE: NRF52840 Dongle not working properly

Simonr — Wed, 08 Dec 2021 13:05:50 GMT

This "Failed to write" message will occur when you flash using the Dongle in the Programmer app as the Dongle will move into running the application, thus the USB bootloader that communicates with the computer and nRFConnect app. You should see the Dongle (if you flash a BLE app onto it) that it switches from pulsing red to blinking green (indicating that it is advertising). Here's a screenshot of a successful flash of the ble_app_hrs application to an nRF52 Dongle on my end:

Best regards,

Simon

RE: NRF52840 Dongle not working properly

Ceranthor — Wed, 08 Dec 2021 08:24:38 GMT

I followed steps from this tutorial. I cannot even revert the bootloader using nrf connect -> programmer i tried multiple times and every bootloader and none of them works

RE: NRF52840 Dongle not working properly

Simonr — Wed, 08 Dec 2021 06:26:46 GMT

Have you checked out our Dongle programming tutorial available here. The device blinking with a green light sounds correct for an advertising device, but when the light changes to red (pulsing red), it sounds like it have returned to Bootloader mode for some reason, which should only occur if you press the button mounted on the side of the Dongle while it's running an application.

Please check out the Dongle programming tutorial to make sure you've flashed the application correctly onto your Dongle, and that you've not accidentally erased the bootloader. How to revert it to the production bootloader is also described.

Best regards,

Simon