Joystick Override / Hold Group guide

This is a guide on how to handle 'Joystick override' and 'Hold groups' for CCU operators - allowing automatic routing of cameras to a confidence monitor.

Imagine these operator steps:

1.  CCU 1 presses the joystick       :: Route cam 1 to monitor
2.  CCU 4 presses the joystick      :: Route cam 4 to monitor
3.  CCU 2 presses the joystick      :: Route cam 2 to monitor
   ...
4.  CCU 4 lets go of the joystick   ::  (nothing happens)
5.  CCU 2 lets go of the joystick   ::  Return to route cam 1 to monitor
6.  CCU 1 lets go of the joystick   ::  Return to original input for monitor

You can of course have more CCU's - and the order of who does what when is remembered by the system.

Prerequisite

This setup requires a 4 things:

• Blue Pill device  --> Is the brain, running the config and controlling both ETH-GPI Link and video switcher/router
  For example 'Blue Pill Server' : https://www.skaarhoj.com/product/blue-pill-server
  
  
• ETH-GPI Link    --> Handles the GP inputs from the CCU's
  https://www.skaarhoj.com/product/eth-gpi-link
  
  
• A number of CCU's with GP output for joystick press
  
  
• A video switcher/router (for example; Aja Kumo, ATEM, Tricaster, vMix etc.)

NOTE: The Blue Pill device must have Reactor 2.2.3-pre10 or later installed. This is handled on the 'Packages' page.
NOTE: The ETH-GPI Link must be in 'Blue Pill Mode', which means it's controlled by a Blue Pill device.

Configuration

1. Goto IP address of Blue Pill device to see Reactor, the configuration manager.
2. Click 'Add panel' and select your ETH-GPI Link
3. Click 'Add device' and select your routing device
4. In the ETH-GPI Link configuration drop-down menu, select default configuration 'Tally & Routing'
5. Click 'Camera Selector' to open settings -> Add empty rows (by holding Shift) -> Set route index [1, 2, 3..]
   (these are the camera inputs on the switcher/router)
6. Click 'Routing Trigger' to open settings -> Select the output to route to
7. Click 'GPIO Input mapping' to open settings -> Change type from ‘Tally Program’ to ‘Route Index’
8. Click 'Config Variables' to open settings -> Select 'Press' or ‘Hold down’

Advanced step to share stack between multiple [Blue Pill Inside] RCP panels in the same configuration:

1. Goto Configuration page -> click '>>' in window left/top top show Layer Tree
2. Find variable: HoldGroupState -> right-click it and copy it
3. Scroll down to lowest Root layer -> right-click it and paste variable here (variables here are shared by all panels)

Screenshots

Same as config steps above

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