Hi - wondering is there a way to get more out of the Serial port output:
- Is it logged to a file (or is there an option to do so ?)
- Is an option to adjust the max buffer size …I’d like it to be able to store a lot before it starts to loose the old logged shown data and it begins to automatically scroll (which can be annoying
- Can I turn on and off the auto scroll (something simple like Arduino IDE Serial check box) would be great
BTW: really enjoying transition from Arduino IDE to PlatformIO — its a powerful tool !
Hi mars,
the serial monitor that is used by pio just uses your base console/terminal (whichever OS you are using). That means you can achieve
- by redirecting the stream to a file with the base-tools of your console/terminal. Under windows this can be achieved with
>
. An example, start the serial monitor in the console with pio device monitor
and redirect the output to a file named test.txt by typing pio device monitor > test.txt
.
- This is also something that is connected to your console/terminal settings so just google how to increase its buffer.
- Once again, a setting that can be set for most terminals/consoles… google should help too.
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Hi,
Thanks for this very good hint.
To make it totally clear to beginners (I am one), in the Mac OSX environment, that means:
- launch terminal from within PlatformIO
- type: pio device monitor > logFile.txt
To exit : ctrl + C
The file logFile.txt will be in the same folder as the files related to the project opened at the time of Terminal launch.
That is VERY convenient.
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Hi everyone!
I’d like to add something to François’s first point:
- In PlatformIO, go to “PIO Home” > “Quick Access” > “Miscellaneous” > “New Terminal” and THEN input the pio device monitor > logFile.txt or platformio device monitor > logFile.txt command.
- BEWARE, that terminal should have "PlatformIO"as a title (not “powershell”) /!\
I missunderstood your first point initially, thinking that the command should be in put in the powershell or cmd terminal, I was getting the infamous " platformio (or pio) is not recognized as an internal or external command ".
Cheers…
… and [solved] 
PS: On another note, one can use software like Baretail to follow the monitor, it will display the logs dynamically!
I was looking for something built in so it “just worked” the docs here tell you how!
https://docs.platformio.org/en/latest/core/userguide/device/cmd_monitor.html
key part is add to platform.ini this code
[env:log_output_to_file]
…
platform = …
monitor_filters = default, log2file
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