At this time, Palette 2 isn't compatible with AstroPrint and will not connect directly to this software. Palette 2 will still work with printers that are connected to AstroPrint by manually loading the print files to your printer and Palette 2's SD cards. We will consider building this compatibility in the future.
If you have a Raspberry Pi with OctoPrint, we'll be releasing the CANVAS Hub plugins. We don't have a plugin for AstroPrint at this time.
If you have any additional questions, please send us a message at firstname.lastname@example.org.