Epson printer ink levels

[SeanPM5]

Checklist:

• [ ] Sensor for printer availability
• [x] Get ink levels from printer page using curl
• [x] Customize sensors with entity_picture images for black, cyan, magenta, yellow, waste cartridges
• [x] Add an input_number slider for low ink threshold (ie 20%)
• [x] Automation to warn of low ink level
• [x] Add an input_boolean to disable notifications for these
• [x] Script to manually refresh ink levels

Make sure to mention the printer model number and ink type in the notification too.

[SeanPM5]

Instead of image icons, think I should use custom:button-card with color_type: card and color hex codes. Easier to quickly see at a glance and it looks a lot nicer too. custom:button-card docs.

Since the buttons aren't going to have text besides the ink level percentage (use show_state: true), should be able to comfortably fit four icons in a horizontal-stack.

Row 1: Black, Yellow, Cyan, Magenta Row 2: Waste, Printer Status, Update, one more

Hardest part is probably picking the icon. Could put individual letters (B, Y, C, M) as the icons. Or mdi:printer. Probably gonna settle on mdi:invert-colors or mdi:water-percent though.