[BUG]: Plugin connected even if printer is offline

[jneilliii]

Describe the Bug
With printer powered off the plugin will still report connection, temperature data, and sd printing status.

Expected Behavior
To not connect in OctoPrint connection panel.

Debug Logs
plugin_bambu_printer_serial.log
octoprint.log

Screenshots

Printer and Plugin Setting Details

• Printer model? X1C
• Is your printer connected to Bambu Cloud? No
• Is the plugin configured for local access only? Yes