Our old printer finally passed away, so HomePi no longer provides AirPrint services, but here's the original recipe updated for DietPi.  I ran a quick test, looks to be good-to-go.  Install/setup takes ~30 Mins.   

• Double check that avahi & CUPS were  installed during DietPi Install steps above
  // I think "dietpi-software list | grep =2 " will highlight installed software //

  • Dietpi CUPS @ https://dietpi.com/docs/software/printing/#cups

  • Quick Start @ https://www.cups.org/doc/overview.html

• Make sure CUPS and friends are running after the install
  http://<homepiIP>:631 

CUPS Config via CUPS web interface @ http://<your PI IP address>:631 (https in latest cups)

• Log in to CUPS administration using DietPi root/<rootpw> credentials 

• Administration page: double check to ensure "Share Printers" and "Allow Remote Admin" are checked

• Administration/Add Printer - "Discovered Network Printers" found our Dell M5200 & Brother Printers
  Couple of tweaks:

  • Set "Printer Description" to match your printer, it is presented in iPhone/Pad's 'Select Printer" dialog

  • I uses Openprinting.org ppd file to set up our printer - https://www.openprinting.org/printers

  • Remember to check the "Share this Printer" box

HowTo Use AirPrint to print from your iPhone, iPad, or iPod touch by Apple Support

HomeBridge is still not part of DietPi software library ... manual install required, but it is A  LOT easier than it used to be!

This one will still take some time, count on an hour with minimal plugin playtime!  

Homepage/info @ homebridge.io, github.com/homebridge/homebridge.   Install Steps are dissected from *new* HomeBridge on Raspian Lite instructions.

One very important preliminary:  Check for plugins for your smart devices before you go through all this install stuff - just to make sure you'll be able to control your device.  Go to https://www.npmjs.com and search for  "homebridge-<your dev>".  For example "homebridge-wemo"  or "homebridge-" to browse the library.

No need to sudo if you are logged in as root on DietPi

1. Via dietpi-software utility:  Install a few prerequisites from Development & Programming Category
   
   [*] 9    Node.js: JavaScript runtime environment
   [*] 17   Git: Clone and manage Git repositories locally
   [*] 130  Python 3: Runtime system, pip package installer and development headers  

2. Add homebridge repository

   • Repository gpg key:
     curl -sSfL https://repo.homebridge.io/KEY.gpg | sudo gpg --dearmor | sudo tee /usr/share/keyrings/homebridge.gpg  > /dev/null

   • Add Repository to system sources:
     echo "deb [signed-by=/usr/share/keyrings/homebridge.gpg] https://repo.homebridge.io stable main" | sudo tee /etc/apt/sources.list.d/homebridge.list > /dev/null

3. Install Homebridge and Homebridge Config UI X

   • Homebridge (which now seems to also install user interface (Config UI)
     apt-get update
     apt-get install homebridge

   • Log into Homebridge Config UI X (This is NICE!) - Default uc/pw = admin/admin - and follow "GET STARTED"
     http://<ip address of your server>:8581

4. Install Plugins based on your IoT world ... The following is a blow-by-blow of adding Nest Plugin - mostly for my sake!
   Steps dissected from https://www.npmjs.com/package/homebridge-config-ui-x

   • Login to UI X via http://<homepi>:858, clink on "Plugins" in the menu bar 

   • Search for plugin's by name/keyword.  There may be multiple plugins to choose from, you'll need to research (check project and readme).
     Alternatively,  search directly via npmjs.com  using "homebridge-" as a prefix.  You can sort/filter based on popularity, quality, maintenance, etc.  

   • INSTALL link on UI X page will add the plugin - homebridge-nest (Nest v4.6.9 plug-in using native Nest API) has worked well).  Plugin's routinely run through a setup/configuration dialog - Nest doc @ https://github.com/chrisjshull/homebridge-nest.  

   • Set up IOS phone via https://support.apple.com/en-us/HT204893.
     PIN/Scan code is on main page of Config UI X.  You can also dig it out of systemd journal via journalctl -u homebridge

   • Debugging:  Troubleshooting Guide @ https://github.com/nfarina/homebridge/wiki/Basic-Trouble-Shooting

Apple Home info @ https://www.apple.com/ios/home/

Cleaned up the recipe but ended up not upgrading to fresh Bullsye rebuild but decided to hold off because of an issue with Backup/Restore @ https://github.com/homebridge/homebridge/issues/3346.   Will revisit when I have time. 

A couple of plugin updates

• Updated Node.js by hand - v16.19.1 to v18.16.0.  Pretty simple/painless via Homebridge ... should be automagically managed by Dietpi in new recipe(?!). 
  More info @ https://github.com/homebridge/homebridge/wiki/How-To-Update-Node.js. 
  Check version via:   node -v
  Update via:  [sudo] hb-service update-node

• Homebridge-Hue:  v0.13.49 to v0.13.59

• Homebridge-Wemo:  v5.0.5 to v6.0.2

• homebridge-smartthings-ik:  v1.5.0 to v1.5.8

Spring cleaning during the winter ... some leftover HomePi updates.  Should be good for a long while!

1. DietPi update from 7.5.2 to 8.1.2 ... no issues.  Just let dietpi-update do it's thing! 

2. Homebridge World

   • Homebridge update v1.3.6 to 1.4.0 ... no issues

   • Homebridge Plugins

     • HomebridgeUi update from v4.41.2 to 4.42

     • Homebridge Deebotecovacs update from v1.4.6 to 1.4.7 ... hmmm some odd chatter during update

     • Homebridge-hue update from v0.13.22 to v013.36

       • plugin recommends running on Node.js v16.13.2 or later ... Easy enough:
         From Homebridge "How to Update Node.js" article, did one of these:  hb-service update-node

     • Homebridge Nest update from v4.6.3 to 4.6.4

     • Homebridge Platform Wemo v3.3.1 - Replace with Homebridge-wemo v4.7.0

       • Platform Wemo was deprecated/replaced quite a while ago but w/out auto migration.  Just hadn't taken time to deal w/ ramifications of automations and such - some old/original smart-stuff here

       •  Step-by-step based on info @ https://www.npmjs.com/package/homebridge-platform-wemo

         1. Backup Homebridge (... Backup/Restore)

         2. Saved a copy of json from HB Config editor (not much there)

         3. Disabled current Wemo-Platform Plugin and restarted HB

         4. Uninstalled Wemo-Platform Plugin 

         5. Installed homebridge-wemo Plugin and accepted config as presented (json looked just like old)

         6. Restarted HB  

         7. Had to move Wemo stuff to correct room assignments and re-setup Automations ... not too bad

     • Homebridge Bravia Tvos - v5.0.1 to v5.0.8

     • Homebridge Nest - v4.5.4 to v4.6.4

     • Homebridge Smartthings - v2.3.8