Hello, we have a problem with our UART data monitoring. We’re using le_fdMonitor_Create to monitor the device file /dev/ttyHS0. The event either triggers always, sometimes it is triggered a few times but stops working then or it is not triggered at all. We implemented a software watchdog which tries…

Finally we found the issue. It had two reasons: Something got corrupted heavily as described here: fdMonitor only works sporadically - #37 by HudriWudri . Please have a look at that stuff because this must not happen!!!. From my point of view there’s something deeply wrong if actions like that corr…

After countless attempts it seems like I successfully downgraded it by using the one-click tool from https://source.sierrawireless.com/resources/airprime/software/wp76xx/wp76xx-firmware-release-12/ (…at least the tool didn’t throw an error). [image] Then I upgraded it again to 16.3 using the one-…

but you don’t see problem with another new chip for softreset and hardreset, right? If so, problem only happens on this particular old module. Not sure if this can revert your old module back to default state: (be careful of the mtd number) [image] Swiflash -r broken with release 12 on…

Yes, we also see it on new chips. At least if the chip is flashed on my colleagues machine. Could it be a problem if the device is not restarted properly after the update (e.g. by just pluging out the supply)? The issue might be a problem with our software, however, if we cannot reset the device to …

I think using swiflash to reset to factory state cannot work for your module in old FW like R12. (i guess it is because your module is using new memory) Have you tried this? [image] Swiflash -r broken with release 12 on wp77xx? IoT Modules …

Just to give an update on this topic. We got a little bit further. We have two devices of which one is sending data to the Sierra Wireless via UART. If the services that send the UART data are shut down and the WP76xx is rebootet, UART works flawlessly but if the services are running, something seem…

did you try this yocto cwe? [image] Kernel BUG at /usr/src/kernel/kernel/time/timer.c:806! Legato Application Framework I cannot reproduce this in mangoh green board with UART1 in data mode. (already send data continuously with baud rate 921600 on other side since boot up)…

No, I haven’t tried that yet. What does that mean? Because that’s what we get before the UART stops working. Not sure if it has any relation to the issue, just asking. Is it just an information, that the interrupt was triggered? [image]

maybe you try the test build first

Ok, so I flashed the device with release 16.0.1 GENERIC via the Windows one-click-tool. [image] Then I downloaded the swiflash tool from http://downloads.sierrawireless.com/tools/swiflash/swiflash.zip and ran swiflash -m WP76xx -i yocto_wp76xx.4k_msm_serial_hs.cwe which (after the second attempt)…

can you paste the ati8 here? As said before, you cannot use " swiflash -m wp76xx -r " in new memory module with any FW or old memory module after R12. If you need to erase the userapp partition, you need to use this: [image] Clear secure storage Legato Application Framework …

fdMonitor only works sporadically

Legato Application Framework

jyijyi March 6, 2023, 6:44am 19

did you try this yocto cwe?

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fdMonitor only works sporadically

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