modem delta update fails when switching from v1.8.0 to 1.9.1

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

Charlie — Wed, 14 Sep 2022 13:34:26 GMT

Thanks for sharing this solution. I will feedback to our development team.

Best regards,

Charlie

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

chmielewskiandreas — Wed, 14 Sep 2022 12:16:46 GMT

Hi,

I did not see any errors during FOTA of the modem firmware as you did if all observations are enabled. If I enable observations for /3 and /5 it works for me as well. I already have found a fix/workaround for that issue by stopping the RDClient when FOTA is started. This accelerates the download a bit and ensures that there is no other traffic on the modem. Thanks 🙂

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

HFled — Wed, 14 Sep 2022 12:16:04 GMT

The issue is that when a modem_delta fw upgrade is started over lwm2m and we concurrently have an observation that periodically creates notifications (e.g. if you observe 3/0/13 with a pmin of a few seconds), the modem never seems to finish the erase operation (continously looing over the nrf_modem_delta_dfu_offset function with return value NRF_MODEM_DELTA_DFU_ERASE_PENDING) started at the beginning.

We suspect this is because the modem is preoccupied with sending/receiving messages and "doesn't get around" to finishing the erase operation.

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

Charlie — Mon, 05 Sep 2022 14:08:46 GMT

Hi chmielewskiandreas,

[quote user="chmielewskiandreas"]I am observing all resources, the update process is stuck in the loop right after that log line[/quote]

I am trying to understand this issue and did some experiments with nRF9160: LwM2M Client on Coiote Device Management platform. The FOTA test is using mfw_nrf9160_update_from_1.3.2_to_1.3.2-FOTA-TEST.bin and mfw_nrf9160_update_from_1.3.2-FOTA-TEST_to_1.3.2.bin to switch MFW between 1.3.2 and 1.3.2-FOTA-TEST. The test is using an LTE-M network. It works well by far except I try to enable all observation. I am even not able to enable all resources, because this will drive huge MCU resources and cause many message errors, and the Coiote itself seems to limit the observation requests you can apply. If I enable only /3 Device and /5 Firmware updates that I think will help me to understand the device during FOTA. Everything worked as expected.

devzone.nordicsemi.com/.../2022_2D00_09_2D00_05T14_5F00_02_5F00_11.861Z_2D00_log.txt

Let me know if I understand your issue correctly.

Best regards,

Charlie

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

chmielewskiandreas — Thu, 01 Sep 2022 15:00:50 GMT

I have debugged the issue to the point that I am thinking that sending/receive data via lwm2m during a modem delta update causes a large delay of the whole update. I can trigger the behavior in a way that if I do not observe any object that I am using in my (test-)application (and so no data is sent/receive) the modem delta update works (only registration update is sent meanwhile). Once I am observing all resources, the update process is stuck in the loop right after that log line

[00:00:04.211,212] <inf> dfu_target_modem_delta: Deleting firmware image, this can take several minutes

and loops over the function

nrf_modem_delta_dfu_offset

basically for ever. Whereas if there is basically no data traffic, a modem delta update takes just 2-3 minutes, with traffic I was waiting for 30 minutes without any progress. Do you see any reason for that behavior? Is constant data traffic during a modem delta update not allowed?

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

Charlie — Wed, 31 Aug 2022 10:31:01 GMT

Hi,

Thanks for the update. I encourage you to test nRF9160: LwM2M Client — nRF Connect SDK 2.0.2 documentation (nordicsemi.com) on Coiote Device Management platform if you are interested in LwM2M base FOTA implementation.
Let me know if you still have issues.

Best regards,

Charlie

RE: modem delta update fails when switching from v1.8.0 to 1.9.1

chmielewskiandreas — Wed, 31 Aug 2022 09:18:37 GMT

Just as a note. I have just tested delta update using modem_delta_update example. This unfortunately works. I am trying to perform a update using lwm2m and coap download.