nRF52840 dongle original bootloader - nRF Connect timeout issue

RE: nRF52840 dongle original bootloader - nRF Connect timeout issue

Sigurd — Mon, 22 Feb 2021 17:24:29 GMT

[quote user="bartbart"]shows the 'Timeout while waiting for device to be attached and enumerated' message. [/quote]

And if you plug the device out from the computer, plug it back in, and open RSSI app, selects the device from the dropdown menu, do you get the same message that you need to re-program it?

If yes,

then try to program the device from the Programmer app. Here are the hex files needed.

devzone.nordicsemi.com/.../mbr.hex

devzone.nordicsemi.com/.../rssi_2D00_10059.hex

Still not working? Then there might be some incompatibility between the RSSI firmware and your board.

Here is the source code for the RSSI firmware code that runs on the nRF52:

https://github.com/NordicSemiconductor/pc-nrfconnect-rssi/blob/master/fw/src/rssi_cdc_acm/main.c

[quote user="bartbart"]When should the reset be pressed?[/quote]

Right before you select the device from the dropdown menu.

RE: nRF52840 dongle original bootloader - nRF Connect timeout issue

bartbart — Tue, 16 Feb 2021 20:38:14 GMT

So I switched over to the BLE app in nRF Connect, selected the board from the dropdown menu, said yes to device being programmed, and lo and behold the discovery feature works and I can scan for BLE devices.

But the original issue is still there - why doesn't it work this way in the RSSI Viewer? I get the same 'device must be programmed' message, I click yes, and after a little while the device gets disconnected from USB and the RSSI Viewer log shows the 'Timeout while waiting for device to be attached and enumerated' message.

I don't have a reset button on the board but I do have access to the reset pin which I can jumper to ground. When should the reset be pressed?

RE: nRF52840 dongle original bootloader - nRF Connect timeout issue

Sigurd — Tue, 16 Feb 2021 16:15:06 GMT

Hi,

Did you see the same with e.g. the Bluetooth Low Energy app in nRF Connect for Desktop, or is this issue only with the RSSI app?

Do you have a reset button on your dongle to put it into bootloader mode?