Possibility to disable log to file (datalog.txt)?

[MattsBos]

Hi there,

Figured I would just ask it in here, I've searched through the documentation but can't really find an option to disable logging to file.
I need to turn logging on for MQTT but don't need logging to file.

I keep getting the following in my webbrowser 80% of the time I try to access a page and it gets annoying really quickly!

`Error opening datalog.txt!
Error opening datalog.txt!
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
Cache-Control: no-cache, no-store, must-revalidate
Pragma: no-cache
Expires: 0

`

[fredlcore]

That shouldn't be. Please post your BSB_LAN_config.h file and your web configuration. Please also post a log file of the serial monitor when this error occurs. Otherwise, it won't be possible to help you.

[fredlcore]

Yes, there is a maximum size, it's set to 40 in BSB_LAN_config.h for the log_parameters setting. If you are initializing this array with more values than the array is defined for, that's undefined behaviour and might be the explanation. But it's strange that the error occurs with 8396 which is the 38th element of the array and not on the last one.

[MattsBos]

Well, just did the OTA update and it's not coming back online, welp.
Will have to follow up later when I can get it back...

[fredlcore]

Good luck!

[MattsBos]

I got it back up and the problem was indeed the log_parameters setting maximum array of 40.
I have increased it to 100 and the errors are gone.

Thanks for the fast and extensive troubleshooting help!
I will mark Dukess his message as answer to avoid people having to search through this whole reply thread.

[fredlcore]

Thanks, but the strange thing is that it was set to 40 and the error occurred with parameter 38. And 40 parameters should still be fine. Could you do us a favor and check two things:
Do the errors still occur when you remove the last entry of your 40 parameters (so that it's 39 in the end)?
Do the errors still occur when you keep your 40 entries but increase the array size from 40 to 41?
Thanks!

[dukess]

Right now i have only one idea: overflow. Looks like function return 0 when SD card is absent and non-zero for used space. By the way log_parameters can be increased without any efforts because all depending values in program will be changed automatically. fredlcore ***@***.***> 24 марта 2022 г. 19:03:54 написал:

…

That is really weird. All this setting does is changing the output stream from Serial to a network stream. There is no difference in code and no messages are written to file. If you are next time at the location where BSB-LAN is running, could you do me one favor please? In BSB_LAN.ino, please search for this line: if (logCurrentValues && freespace > MINIMUM_FREE_SPACE_ON_SD) { It should be around line 6564 in current code. Right after that line please add these three lines:Serial.println(logCurrentValues); Serial.println(freespace); Serial.println(MINIMUM_FREE_SPACE_ON_SD); And change back to Serial output and see if this error occurs again and what the Serial output then is. @dukess, do you have any idea why this could change things? — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: ***@***.***>

[MattsBos]

That was the fix, I've adjusted the array log_parameters in the config to 100 instead of 40 and it's now working as expected. I was unaware of this maximum.