add module for live-plotting data with plotjuggler

[D4SK]

Plotjuggler is a more powerful and easy alternative to matplotlib. It is used by large companies in the robotics and self-driving space. This PR serves as a minimal prototype and can be further integrated with motan, the heater controller etc. in the future. I encourage anyone to try it out.

Limitations

• websocket server is only supported with the Linux version of plotjuggler
• when passing non monotonic timestamps e.g. after a klipper restart plogjuggler has to be restarted as well due to a bug in plotjuggler

How-to use

• run pip install websocket-client in the klippy virtual-environment
• add the following config section with your pc's ip

[plotjuggler]
host_adress: 192.168.178.100:9871

• open the plotjuggler software and select the websocket from the dropdown, click on start and enter the port as well as 'timestamp' in the respective fields.

• periodically run code sections like this to plot data

plotjuggler = self.printer.lookup_object('plotjuggler', None)
if plotjuggler:
    plotjuggler.send_data(read_time, self.heater.name, {
        'temp': temp,
        'target_temp': target_temp})

[github-actions[bot]]

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[github-actions[bot]]

Unfortunately a reviewer has not assigned themselves to this GitHub Pull Request and it is therefore being closed. It is a good idea to move further discussion to the Klipper Discourse server. Reviewers can reach out on that forum to let you know if they are interested and when they are available.

Best regards, ~ Your friendly GitIssueBot

PS: I'm just an automated script, not a human being.