turtleplotbot module
====================

Hardware
--------

The TurtlePlotBot uses an ESP32 Microcontroller module and a |drawbotboard|
to run a pair of 28BYJ-48 stepper motors. The stepper motors are driven by a
UNL2803A Darlington transistor array. The UNL2803A is connected to a MCP23017
i2c 16-bit port expander to run the stepper motors and provide an additional
8-bit I/O port.

|

.. figure:: images/hello.jpg
   :align: center

   TurtlePlotBot

Interface functions
-------------------

The `turtleplotbot` module contains the `TurtlePlotBot` class used to provide
the hardware interface needed by the `turtlebot` module to run the robot using
an ESP32 Microcontroller device and a |drawbotboard|.

User programs use the functions inherited from the `TurtlePlot` class for
moving and drawing.

.. autoclass:: turtleplotbot.TurtlePlotBot
   :members:
   :undoc-members:
   :private-members:

turtleplotbot implementation
----------------------------

.. literalinclude:: ../../lib/turtleplotbot.py
    :linenos:
    :language: python