mcumgr hangs during image upload

RE: mcumgr hangs during image upload

Sigurd Hellesvik — Mon, 08 Aug 2022 06:36:34 GMT

Good to hear that you got to the AT commands!

If you face issues related to the network connection, it would be nice if you create a new ticket on that, to keep DevZone tidy.

Regards,
Sigurd Hellesvik

RE: mcumgr hangs during image upload

dkhayes117 — Sat, 06 Aug 2022 19:44:36 GMT

Looks like I got the LTE Link Monitor working. I must have still been in MCUBoot mode after I flashed the hex file. I flashed it again and power cycled and I can run at commands now. Still no network connection yet though.

RE: mcumgr hangs during image upload

dkhayes117 — Sat, 06 Aug 2022 17:12:22 GMT

I was able to flash `thingy91_at_client_2022-06-02_880c82db.hex` to the board, but I still can't use LTE Link Monitor. UART flashes from yellow to red.

13:06:45.310	Modem port is opened
13:06:49.538	Error: 'AT+CFUN=1 ' timed out
13:06:56.718	Error: 'AT+CFUN? ' timed out
13:07:11.476	Modem port is closed
13:07:13.309	Modem port is opened
13:07:17.914	Modem port is closed
13:07:17.953	Modem port is opened
13:07:22.014	Error: 'AT+CFUN=1 ' timed out
13:08:44.003	Modem port is opened
13:08:45.579	Modem port is closed
13:08:45.621	Modem port is opened
13:08:51.448	Error: 'AT+CFUN=1 ' timed out
13:10:27.053	Network search failed: Error: 'AT+COPS=? ' timed out
13:10:28.056	Error: 'CEREG? ' timed out
13:10:29.060	Error: 'CEREG? ' timed out
13:10:30.075	Error: 'CEREG? ' timed out
13:10:31.079	Error: 'AT ' timed out
13:10:32.091	Error: 'CEREG? ' timed out
13:10:33.096	Error: 'AT+CEREG? ' timed out
13:10:34.102	Error: 'AT+CEREG? ' timed out

RE: mcumgr hangs during image upload

Sigurd Hellesvik — Fri, 05 Aug 2022 07:12:57 GMT

Hi Daniel,

MCUBoot is a bootloader, which main job is to boot your application, making it possible to upgrade the application using what is known as Device Firmware Update.

The LTE Link Monitor is an UART monitor with some extra functionality.
For the LTE Link Monitor to work, you need your application to expose the AT command functionality on the UART connected to the PC.
See our AT Client for a simple example this.

In other words, MCUBoot is not needed for the LTE Link Monitor.

Regards,
Sigurd Hellesvik

RE: mcumgr hangs during image upload

dkhayes117 — Thu, 04 Aug 2022 13:30:38 GMT

I misunderstood then, I thought mcumgr could be used without MCUBoot. I think MCUBoot is gone, because I am using Rust Programming not Zephyr. When I flashed it last, the Rust Firmware only has a secure partition manager linked in, that's it.

The only reason I want the MCUBoot back, is so I can use it to debug my cellular connection with LTE Link Monitor. It times out when I try to send AT commands, so I thought it must be the missing MCUBoot that is causing it to fail. So far, I can't get an LTE link. It stays in CEREG 0,4 (unknown) and never finds a link.

Thanks,

Daniel

RE: mcumgr hangs during image upload

Sigurd Hellesvik — Thu, 04 Aug 2022 06:22:31 GMT

After reading your original question again, I see that you say:

[quote user=""]I have a thingy91 that has been flashed over JLINK which has wiped out the MCUBoot.[/quote]

Can you explain how you know MCUBoot has been wiped out?

Can you include details on how you flashed over JLINK?

[quote user="dkhayes117"]I don't think that is the problem,[/quote]

I agree. Here is what I think is wrong:

Mcumgr is a tool to send an image compatible with MCUBoot.
This requires that your application has both MCUBoot activated and functionality as either a Serial Recovery or SMP Server.
If you wiped your application using a programmer/debugger, you can no longer use Mcumgr, since you have no such application.

Fix: You need to flash the application to your Thingy using an external debugger(nRF9160 Developement Kit or a JLINK debugger/programmer).
I recommend you use our nRF Programmer app in nRF Connect for Desktop for the software side. Get the prcompiled firmware from the Nordic Thingy:91 product page.

Regards,
Sigurd Hellesvik

RE: mcumgr hangs during image upload

dkhayes117 — Wed, 03 Aug 2022 23:49:01 GMT

I don't think that is the problem, as I am not building with Zephyr, I'm trying to flash a pre-compiled binary from Nordic. When I run

mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" echo hello

I do not get "hello" back, just an empty line. ttyACM0 has the correct privileges and I don't see anything else wrong. The uart connection just doesn't seem to work.

RE: mcumgr hangs during image upload

dkhayes117 — Wed, 03 Aug 2022 10:45:44 GMT

I will try that later when I can. I will report back. Thanks!

RE: mcumgr hangs during image upload

Sigurd Hellesvik — Wed, 03 Aug 2022 09:25:57 GMT

Hi,

Could it be the same issue as in Serial DFU on NRF9160-DK fail to upload image using mcumgr ?

Regards,
Sigurd Hellesvik