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…

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 …

[image] If we restart the app, UART works again (as mentioned in the original post with the watchdog). Ah yes, you are right, I forgot about that. However, after clearing the user partition, the error remains the same.

seems you are not using my yocto image “yocto_wp76xx.4k_msm_serial_hs.cwe”, the yocto build time should be december 2022… [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 …

Reflashed it [image] Now I don’t even got data with cat < /dev/ttyHS0 :frowning: Baudrate was wrong. Now we get something with cat < /dev/ttyHS0. Will try, if the application also gets data.

Error still exists. Even microcom doesn’t work anymore after the application ran and was stopped again. [image]

I don’t see the error Is that you cannot receive uart data sometimes?

Yes, that’s exactly the problem. There’s no error shown, just nothing received anymore.

fdMonitor only works sporadically

Legato Application Framework

jyijyi March 7, 2023, 10:50am 25

seems you are not using my yocto image “yocto_wp76xx.4k_msm_serial_hs.cwe”, the yocto build time should be december 2022…

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fdMonitor only works sporadically

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