Add REV Servo Hub to Status Light Quick Reference (#3106)

* Add REV Servo Hub status LED patterns to quick reference

Fixes #2976

* Update source/docs/hardware/hardware-basics/status-lights-ref.rst

Co-authored-by: sciencewhiz <[email protected]>

---------

Co-authored-by: sciencewhiz <[email protected]>

Author: jasondaming

source/docs/hardware/hardware-basics/status-lights-ref.rst

@@ -459,7 +459,7 @@ Brake/Coast/Cal Button/LED - Red if the controller is in brake mode, off if the
 
 ### Status LEDs
 
-Each channel has a corresponding status LED that will indicate the sensed state of the connected :term:`PWM` signal. The table below describes each state’s corresponding LED pattern.
+Each channel has a corresponding status LED that will indicate the sensed state of the connected :term:`PWM` signal. The table below describes each state's corresponding LED pattern.
 
 +-----------------------+----------------+
 | State                 | Pattern        |
@@ -475,6 +475,31 @@ Each channel has a corresponding status LED that will indicate the sensed state
 
 - 6V Power LED off, dim, or flickering with power applied = Over-current shutdown
 
+## REV Robotics Servo Hub
+
+[REV Servo Hub Status LED Patterns](https://docs.revrobotics.com/rev-crossover-products/servo/servo-hub/servo-hub-status-led-patterns)
+
+### General Status LED
+
++-------------------------+----------------------------------------------------------------+
+| LED Color               | Status                                                         |
++=========================+================================================================+
+| Magenta Blinking        | Powered on but not connected to a controller or                |
+|                         | the REV Hardware Client                                        |
++-------------------------+----------------------------------------------------------------+
+| Blue Solid              | Connected to REV Hardware Client                               |
++-------------------------+----------------------------------------------------------------+
+| Solid Cyan              | Connected to a roboRIO or CAN controller                       |
++-------------------------+----------------------------------------------------------------+
+| Green Solid             | Connected to a Control Hub or RS-485 controller                |
++-------------------------+----------------------------------------------------------------+
+| Orange/Cyan Blinking    | Battery voltage is lower than 5.5V                             |
++-------------------------+----------------------------------------------------------------+
+| Orange/Yellow Blinking  | CAN fault detected                                             |
++-------------------------+----------------------------------------------------------------+
+| Orange/Magenta Blinking | Overcurrent fault                                              |
++-------------------------+----------------------------------------------------------------+
+
 ## Spike relay configured as a motor, light, or solenoid switch
 
 .. image:: images/status-lights/spikeRelay1Light.png