Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

RE: Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

Vidar Berg — Wed, 12 Oct 2022 14:09:37 GMT

Thanks for the clarification. But I'm not sure if it really matters if you run the UF2 or open bootloader on the device as long as you are able upload the application image (i.e. sniffer_nrf52840dongle_nrf52840_4.1.0.hex or the connectivity hex).

Are you able to upload 'sniffer_nrf52840dongle_nrf52840_4.1.0.hex' to the dongle without errors, and does it show up as a USB device afterwards?

RE: Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

titou4307 — Tue, 11 Oct 2022 20:25:44 GMT

I have done many and many tests and try with nrfutil, adafruit-nrfutil and nrfconnect....So at this time my memory is in default ...sorry I not give to your all the tests and procedure

I have follow the Elektor process without success...

The Oem firmware if I not say error is openbootloader so I have try to pass in UF2 bootloader...

And yes in final this is the firmware "sniffer_nrf52840dongle_nrf52840_4.1.0.hex" I use ....

RE: Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

Vidar Berg — Tue, 11 Oct 2022 09:28:52 GMT

I don't have this Makerdiary dongle here to test with, so I can tell if this is expected behavior or not, unfortunately. We only test nRF connect app with the following boards:

(nRF Connect Bluetooth Low Energy)

And the nRF sniffer:

[quote user="titou4307"]With this soft I can scan BLE and pass on other app so the Nrfconnect ask to me flashing at each time .... I think it is the normal mode ??[/quote]

What Softdevice did you use, and how did you program it?

[quote user="titou4307"]But one chance I succeed to flash the bootloader and normally the dongle must start and appear like USB key but nothing !![/quote]

What bootloader are you trying to flash, the UF2 or the open bootloader?

[quote user="titou4307"]It will OK at this time but I don't know why it function or not and why it impossible to enter in DFU mode (reset at connection) each time and not one time or one time....[/quote]

Did you manage to load the sniffer FW .hex (sniffer_nrf52840dongle_nrf52840_4.1.0.hex) to your dongle?

RE: Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

titou4307 — Mon, 10 Oct 2022 21:15:19 GMT

Hello Vidar

First many thanks for the first response

this product is the Dongle Usb of Makerdiary....

I don't know where is the problem....When I connect the dongle led passed to green (when I push the reset button...)

After this It appear on usb to serial

But impossible to access to this peripheral with nrfutil, adafruit-nrfutil and your software nrfconnect

But after many and many test and more and more hours, after a change of the product of Makerdiary I have an issue with wizzard....

When I reset the dongle (while connecting) the dongle pass green to red blink and after it return green

Other try the led is green, I reset the dongle, the led pass in blank and so after in green

I have reset by clicking the reset button and magic it appear in the nrfconnect

With this soft I can scan BLE and pass on other app so the Nrfconnect ask to me flashing at each time .... I think it is the normal mode ??

I would like to have this dongle into wireshark so I follow the tutorial in Elektor :

https://www.elektormagazine.fr/magazine/elektor-275/61031

With many try and many hours (night !!) impossible to change the bootloader...

But one chance I succeed to flash the bootloader and normally the dongle must start and appear like USB key but nothing !!

After research I found this link :

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_sniffer_ble%2FUG%2Fsniffer_ble%2Fintro.html

It will OK at this time but I don't know why it function or not and why it impossible to enter in DFU mode (reset at connection) each time and not one time or one time....

There is a solution to verify the flash, bootloarder and other parameter on this dongle ??

RE: Nrf52840 and nRF Connect Bluetooth Low Energy 4.0.0 - impossible to connect properly

Vidar Berg — Mon, 10 Oct 2022 11:01:39 GMT

Hello Claude,

The errors indicate that there is a communication issue between your PC and the connectivity board/dongle, but I don't see any indication of what is causing it. Are you using the nRF52840 Dongle to test with?

Best regards,

Vidar