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I'd love to print to a Cat Printer from an iOS device via AirPrint. I see a ton of AirPlay to CUPS projects on Github, but I'm not quite sure how CUPS would be configured to simply call the Cat Printer python script. Any pointers on how to leverage CUPS or should I simply focus on an AirPrint server that directly calls Cat Printer?

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I would take a look at https://en.opensuse.org/SDB:Using_Your_Own_Backends_to_Print.... Going off a quick glance at the code examples, I think it might be fairly straightforward to hook into CUPS. https://github.com/jsmeix/cups-backends also has some useful looking tools.

It’s pretty easy to add backends to CUPS. They are just shell scripts. I’ve written a few ruby ones. Here’s an example of one I adapted for my own purposes:

https://ofosos.org/2018/10/22/printing-to-remarkable-cloud-f...

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