SLM XFOTA always fails

RE: SLM XFOTA always fails

Bernhard — Fri, 14 Mar 2025 13:55:21 GMT

Hello Sigurt,

thank you a lot, that did the trick!

Would be nice to also add a hint on this page:

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/applications/serial_lte_modem/doc/FOTA_AT_commands.html

Best regards,
Bernhard

RE: SLM XFOTA always fails

Sigurd — Thu, 13 Mar 2025 13:02:27 GMT

Hi!

PPP + other socket operations at the same time will not work. See https://docs.nordicsemi.com/bundle/ncs-latest/page/nrfxlib/nrf_modem/doc/sockets/raw_sockets.html

As a workaround, could you try temporarily disable PPP with AT#XPPP=0, then do XFOTA, and then enable PPP again with AT#XPPP=1

RE: SLM XFOTA always fails

Bernhard — Wed, 12 Mar 2025 20:21:21 GMT

Hello Sigurd,

yes, with CONFIG_SLM_PPP=n it is working perfectly fine

00> *** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
00> *** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
00> [00:00:00.255,584] <inf> at_cmd_custom: Custom AT commands enabled with 38 entries.
00> [00:00:00.261,566] <inf> fs_nvs: 2 Sectors of 4096 bytes
00> [00:00:00.261,566] <inf> fs_nvs: alloc wra: 0, fe8
00> [00:00:00.261,596] <inf> fs_nvs: data wra: 0, 0
00> [00:00:00.498,992] <inf> slm: lib_modem init: 0
00> [00:00:00.499,511] <inf> mcuboot_util: Image index: 0, Swap type: none
00> [00:00:00.499,511] <inf> slm: Serial LTE Modem
00> [00:00:00.592,895] <inf> nrf_cloud_info: Device ID: 504b5839-3736-4e69-8022-202375aab4b4
00> [00:00:00.598,144] <inf> nrf_cloud_info: IMEI:      350457794629749
00> [00:00:00.690,399] <inf> nrf_cloud_info: UUID:      504b5839-3736-4e69-8022-202375aab4b4
00> [00:00:00.696,136] <inf> nrf_cloud_info: Modem FW:  mfw_nrf9160_1.3.7
00> [00:00:00.696,166] <inf> nrf_cloud_info: Protocol:          MQTT
00> [00:00:00.696,19HTTPS
00> 
00> [00:01:07.955,505] <inf> download_client: Downloading: terminal-modem/delta_1.3.7_to_1.3.7-FOTA-TEST/modem.bin [0]
00> [00:01:08.443,908] <inf> download_client: Connecting to 35.173.69.207
00> [00:01:09.249,908] <inf> download_client: Downloaded 2048/14248 bytes (14%)
00> [00:01:09.250,274] <inf> dfu_target_modem_delta: Modem firmware version: e7a1c54a-b07c-4512-9c3e-8ecbbfe2641d
00> [00:01:10.047,790] <inf> download_client: Downloaded 4096/14248 bytes (28%)
00> [00:01:10.821,014] <inf> download_client: Downloaded 6144/14248 bytes (43%)
00> [00:01:11.179,962] <inf> download_client: Downloaded 8192/14248 bytes (57%)
00> [00:01:11.749,023] <inf> download_client: Downloaded 10240/14248 bytes (71%)
00> [00:01:12.076,934] <inf> download_client: Downloaded 12288/14248 bytes (86%)
00> [00:01:12.797,973] <inf> download_client: Downloaded 14248/14248 bytes (100%)
00> [00:01:12.956,970] <inf> download_client: Download complete
00> [00:01:13.082,550] <inf> dfu_target_modem_delta: Scheduling modem firmware upgrade at next boot

Not sure what to do with this information, PPP is the only reason for this whole application so I am not able to deactivate it. Does it give any further hint on how to fix it?

Thank you.

RE: SLM XFOTA always fails

Sigurd — Wed, 12 Mar 2025 13:06:49 GMT

Hi!

Could you check if it works when you set CONFIG_SLM_PPP=n

RE: SLM XFOTA always fails

Bernhard — Tue, 11 Mar 2025 20:51:57 GMT

Hello,

I have tried these configurations already but (although I cann see changes in the generated .config and .hex files) they are not functional at all. Not only is the result of the XFOTA command the same but also "AT+CGCONTRDP=0" still responds with the old DNS address in "DNS_prim_addr" and also in the pppd logfile there is still the original DNS configured.

Best regards,
Bernhard

RE: SLM XFOTA always fails

Sigurd — Tue, 11 Mar 2025 12:32:29 GMT

Does it help to set these in prj.conf?

CONFIG_DNS_RESOLVER=y
CONFIG_DNS_SERVER_IP_ADDRESSES=y
CONFIG_DNS_SERVER1="8.8.8.8"

RE: SLM XFOTA always fails

Bernhard — Tue, 11 Mar 2025 05:49:29 GMT

Hello,

this is the full output:

00> *** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
00> *** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
00> [00:00:00.255,706] <inf> at_cmd_custom: Custom AT commands enabled with 41 entries.
00> [00:00:00.261,901] <inf> fs_nvs: 2 Sectors of 4096 bytes
00> [00:00:00.261,932] <inf> fs_nvs: alloc wra: 0, fe8
00> [00:00:00.261,932] <inf> fs_nvs: data wra: 0, 0
00> [00:00:00.493,988] <inf> nrf_modem_lib_trace: Trace thread ready
00> [00:00:00.501,464] <inf> nrf_modem_lib_trace: Trace level override: 2
00> [00:00:00.502,471] <inf> slm: lib_modem init: 0
00> [00:00:00.503,021] <inf> mcuboot_util: Image index: 0, Swap type: none
00> [00:00:00.503,051] <inf> slm: Serial LTE Modem
00> [00:00:00.597,015] <inf> nrf_cloud_info: Device ID: 504b5839-3736-4e69-8022-202375aab4b4
00> [00:00:00.602,447] <inf> nrf_cloud_info: IMEI:      350457794629749
00> [00:00:00.695,312] <inf> nrf_cloud_info: UUID:      504b5839-3736-4e69-8022-202375aab4b4
00> [00:00:00.701,08MQTT
00> 
00> [00:00:22.069,091] <inf> slm_ppp: Connection up. Starting PPP.
00> [00:00:22.072,265] <inf> slm_ppp: PPP started.
00> [00:01:08.481,658] <inf> download_client: Downloading: terminal-modem/delta_1.3.7_to_1.3.7-FOTA-TEST/modem.bin [0]
00> [00:02:08.506,683] <err> download_client: DNS lookup failed http://embacher.pythonanywhere.com
00> [00:02:08.506,744] <err> fota_download: Download client error

RE: SLM XFOTA always fails

Sigurd — Tue, 11 Mar 2025 00:09:42 GMT

Hi!

[quote user=""]Via RTT-Logging there is an error "DNS lookup failed"[/quote]

Could you post the log from RTT that shows this?