The controller has a `.source` attribute this can be set in the json. `"co2"` indicates that the source is co2 rather than fiber (requires some different commands).
What's Changed
* Add CO2 Source for Galvo Plotter by tatarize in https://github.com/meerk40t/galvoplotter/pull/5
**Full Changelog**: https://github.com/meerk40t/galvoplotter/compare/0.1.2...0.2.0