Trying to update modem SW on a brand new Thingy 91 board. MCUboot DFU failed. Please make sure that the device is in MCUboot mode and try again. None of answered questions fixed issue.

[Jimbrookline]

Windows 10 USB link. NRF connect 3.6. Followed recommended instruction on extracting firmware. Pressed switch 3 in middle of board on power up. Device showed up in window. Clicked enable MCU boot.  Got error: MCUboot DFU failed. Please make sure that the device is in MCUboot mode and try again.    You can see the file version I was trying to load below.   Sorry, I can't tell what serial number the board is. But it says: PCA20035   1.4.0   2020.22  I noted that several people have posted about this, but did not see any solutions in the threads.   I do not have a segger debugger.

Thanks

Jim

20:26:17.108

Modem DFU starts to write...

20:26:17.108

Writing C:\Users\jimdo\OneDrive\Nordic\thingy91_fw_2020-10-30_5522ca2b (1)\mfwnrf9160122.zip to device

20:26:29.566

MCUboot DFU failed. Please make sure that the device is in MCUboot mode and try again.

[Jimbrookline]

Getting stuck again.  Trying to down load

go get github.com/apache/mynewt-mcumgr-cli/mcumgr from C:\Go but keeps returning an error that executable file not found in path...
II am sure this is a dumb syntax error somewhere, I can see the file on github. Sorry to hit you with these rookie things.

[Didrik Rokhaug]

Have you installed Go?

As C:\Go is the default install path, I assume you have, but it never hurts to make sure.

Next, could you check if 'C:\Go\bin' is in your Path?

For me, it is in the system Path, and not my user's Path, so you might have to check both. If it is not there, try to add it to your (user's) Path, and see if that helps.

You might also have to add '%USERPROFILE%\go\bin' to your path, to let cmd find mcumgr.

[Jimbrookline]

It was suggested that I try c:Go\bin also, but this does not work.  For clarity this is the error I get:

C:\Go>go get github.com/apache/mynewt-mcumgr-cli/mcumgr
go: missing Git command. See https://golang.org/s/gogetcmd
package github.com/apache/mynewt-mcumgr-cli/mcumgr: exec: "git": executable file not found in %PATH%

Can you confirm that the file exists at this path in Github? 

And can you confirm the syntax you are suggesting? i.e. %user----\bin?

[Didrik Rokhaug]

Ah, it seems like you do not have Git installed. You can get it from here: https://git-scm.com/

If I remember correctly, there should be a 'Add to Path' checkbox somewhere in the install wizard.

In addition, you probably have to open a new cmd window for it to find Git.

[Jimbrookline]

THX!

[Jimbrookline]

Ok, got it loaded and running.  Started by trying to upload the bin file for the N52.  Attached Thingy in program mode by turning on with button pushed.

Got this encouraging message: but upload did not proceed...

C:\Go\mynewt-mcumgr-cli-master\mcumgr>mcumgr --conntype=serial --connstring=COM3 image upload connectivity.bin
0 B / 280.36 KiB [-------------------------------------------------------------------------------------------] 0.00%

Programming tool said that the device was connected by both COM3 and COM4.  I tried both, neither worked.

So then I tried the upload serial reset command just to see if there were any signs of life..

C:\Go\mynewt-mcumgr-cli-master\mcumgr>mcumgr>mcumgr>mcumgr>mcumgr --conntype=serial --connstring=COM3 reset
Error: NMP timeout

Got the time out error.

Any other suggestions? I am beginning to think the unit is bad....

Thx

Jim

[Didrik Rokhaug]

Could you try from a Linux VM or computer?

It might "just" be a known problem with the Windows drivers. If so, it should work from Linux. And, once you have upgraded the 52 to a newer version, it should work on Windows as well.

[Jimbrookline]

Hi Didrik,   I have it working now.  Here is the secret.  Don't turn the unit off and on by hot switching the USB cable.   Use the on-off switch.  Then it started behaving and I was able to upload SW using mcumgr.  I need to go back and test the USB.  Yes, customers can do the strangest things......

Thanks for all of your help, I will close the ticket.