Added description to inventor_box example

Author: ZodiusInfuser

micropython/examples/inventor/README.md

@@ -31,6 +31,8 @@
 - [Audio Examples](#audio-examples)
   - [Tone Song](#tone-song)
   - [Motor Song](#motor-song)
+- [Showcase Examples](#showcase-examples)
+  - [Inventor Bot](#inventor-bot)
 
 ## Function Examples
 
@@ -194,4 +196,12 @@ This example shows you how you can use Inventor 2040/2350 W's audio output with
 ### Motor Song
 [audio/motor_song.py](audio/motor_song.py)
 
-A fun example of how to change a motor's frequency to have it play a song.
+A fun example of how to change a motor's frequency to have it play a song.
+
+
+## Showcase Examples
+
+### Inventor Bot
+[showcase/inventor_bot.py]([showcase/inventor_bot.py)
+
+A 2-wheeled remote-controlled robot with gripper, powered by Inventor 2040/2350 W.

micropython/examples/inventor/showcase/inventor_bot.py

@@ -6,21 +6,28 @@
 
 
 """
-A demonstration of driving both of Inventor 2040 W's motor outputs through a
-sequence of velocities, with the help of their attached encoders and PID control.
+A 2-wheeled remote-controlled robot with gripper, powered by Inventor 2040/2350 W.
+
+Remote control is achieved by an IR receiver is connected to GPIO0.
+Signals detected by the receiver are processed by the AyeArr library
+and passed to callback functions for various robot actions. These are
+* Drive forward / backward
+* Turn left / right
+* Gripper open / close
+* Set onboard LED colours
+
+The gripper is driven by a servo connected to the SERVO_1 header.
 
 Press "User" to exit the program.
 """
 
 # Wheel friendly names
 LEFT = MOTOR_A
 RIGHT = MOTOR_B
-NAMES = ["LEFT", "RIGHT"]
 
 # Constants
 UPDATES = 100                           # How many times to update the motor per second
 UPDATE_RATE = 1 / UPDATES
-PRINT_DIVIDER = 4                       # How many of the updates should be printed (i.e. 2 would be every other update)
 
 # Motor Constnats
 GEAR_RATIO = 50                         # The gear ratio of the motors