Reads the XML datastream of a LI-840A CO2 analyzer and outputs it to CSVs through pandas. Likely works with any LI-COR which has similar XML output scheme.
This is a basic script that's meant to help read LI-COR data without relying on the application, if there's some issue with dependencies or concern about reliability (like there was in my case).
make sure you plug in the li-cor first before operating so that pyserial has a USB port to look for.
In the code, modify
portpath = "YOUR_PORT_PATH"
to the correct portpath. Linux-likes are usually \dev\ttyUSB# format while windows uses form COM#.
Ensure that your serial refresh rates & baud rates are all correct (default is 9600 and a 1s timeout but depending on your data
frequency you'll need to do a faster/slower timeout on the port).
export_interval controls the length (in s) between data exports from the monitor.
filepath controls the path to the folder that will contain exported CSVs from this program.
the program will run indefinitely in terminal and provides a timestamped "successful export" message each time it outputs data.
ctrl+c stops the program and exports the remaining buffer of data to the specified folder.