Add more advanced and remote recipes

docs/recipes_advanced.rst

@@ -22,11 +22,66 @@ travispy``.
 Button controlled robot
 =======================
 
-Alternatively, use four buttons to program the directions and add a fifth
-button to process them in turn, like a Bee-Bot or Turtle robot.
+Alternatively to the examples in the simple recipes, you can use four buttons
+to program the directions and add a fifth button to process them in turn, like
+a Bee-Bot or Turtle robot.
 
 .. literalinclude:: examples/robot_buttons_2.py
 
+Who's home indicator
+====================
+
+Using a number of green-red LED pairs, you can show the status of who's home,
+according to which IP addresses you can ping successfully. Note that this
+assumes each person's mobile phone has a reserved IP address on the home router.
+
+.. literalinclude:: examples/whos_home_leds.py
+
+Alternatively, using the `STATUS Zero`_ board:
+
+.. literalinclude:: examples/whos_home_status.py
+
+Robot controlled by 2 potentiometers
+====================================
+
+Use two potentiometers to control the left and right motor speed of a robot:
+
+.. literalinclude:: examples/robot_pots_1.py
+
+.. note::
+
+    Please note the example above requires Python 3. In Python 2, :func:`zip`
+    doesn't support lazy evaluation so the script will simply hang.
+
+To include reverse direction, scale the potentiometer values from 0-1 to -1-1:
+
+.. literalinclude:: examples/robot_pots_2.py
+
+BlueDot
+=======
+
+BlueDot is a Python library an Android app which allows you to easily add
+Bluetooth control to your Raspberry Pi project. A simple example to control a
+LED using the BlueDot app:
+
+.. literalinclude:: examples/bluedot_led.py
+
+Note this recipe requires ``bluedot`` and the associated Android app. See the
+`BlueDot documentation`_ for installation instructions.
+
+BlueDot robot
+=============
+
+You can create a Bluetooth controlled robot which moves forward when the dot is
+pressed and stops when it is released:
+
+.. literalinclude:: examples/bluedot_robot_1.py
+
+Or a more advanced example including controlling the robot's speed and precise
+direction:
+
+.. literalinclude:: examples/bluedot_robot_2.py
+
 Controlling the Pi's own LEDs
 =============================
 
@@ -71,3 +126,5 @@ run the following commands:
 
 
 .. _travispy: https://travispy.readthedocs.io/
+.. _STATUS Zero: https://thepihut.com/status
+.. _BlueDot documentation: http://bluedot.readthedocs.io/en/latest/index.html