prusa_plottemp.py - Plots temperature readings from a Prusa 3D printer.

This is a hacky script for plotting temperature readings and thermal model errors from a Prusa 3D printer. I wrote it to troubleshoot thermal anomalies reported by my MK3S+.

Send the following commands to the printer over a serial connection to log temperature data and thermal model errors during a print or PID calibration run. Save the serial output from the printer to a file, then run this script to plot temperature readings over time. For more info, see: https://help.prusa3d.com/article/thermal-model-calibration_382488

M155 S1 C3 ; enable advanced temp and fan logging
D70 I1     ; enable temp model debug logging

Depends on matplotlib and tk.

Installing dependencies

Some basic steps...

python3 -m venv env
source ./env/bin/activate
python3 -m pip install -r requirements.txt

Usage

Run the script within your activated virtual environment and pass in the path to a text file containing temperature log lines.

python3 ./prusa_plottemp.py <path/to/logfile>