<p>This is a simple, inexpensive, transmitter and controller for conducting ARDF Foxoring competitions and for demonstrating ARDF principles. The software project is an Arduino script that builds for and runs on most Arduino-like products, including <ahref="https://www.adafruit.com/product/2590">AdaFruit's Metro Mini 328</a>, or <ahref="https://www.sparkfun.com/products/11113">SparkFun's Arduino Pro Mini 328</a>, and most any board with an ATMEGA328P processor.</p>
<p>The software is a proper Arduino script that will open and build without warnings or errors in Arduino IDE version 1.8.12 and later. It has also been shown to work with the online <ahref="https://create.arduino.cc/editor">Arduino Web Editor</a>. The Arduino IDE can be used to program a device that contains a compatible bootloader. Most Arduino products ship with a bootloader pre-installed.</p>
<p>After being programmed, the controller can be configured via a serial port on the board. An Arduino board that includes a USB-to-Serial converter will allow you to configure the controller with a simple USB cable (standard to micro) connected between a USB port on your computer to one on the Arduino board. Less sophisticated Arduino boards lacking a USB-to-Serial converter will require a special FTDI cable like <ahref="https://www.adafruit.com/product/70">AdaFruit's FTDI Serial TTL-232 USB Cable</a>, or <ahref="https://www.sparkfun.com/products/9718">SparkFun's FTDI Cable 5V</a>.</p>
<p>The fox-controller software provides an output pin for controlling a transmitter for sending Morse code characters (high = key down; low = key up) and a separate pin that sends the Morse code as audio tones that can be used to drive a speaker. The controller can also provide a sequence of starting-tones prompting competitors to begin a competition, and can thus serve as an electronic starting "gun" for use in ARDF events.</p>
<p>The fox-controller serial interface operates at 57600 baud, and can be accessed using any serial TTY interface program such as PuTTY or Arduino's own Serial Monitor tool. It provides a command prompt > indicating that it is ready to receive any of the following commands.
<p>The transmitter can be configured using the serial port, or using the DIP switch and sync-button hardware interface. Only a subset of the possible configurations is available when using only the hardware interface. Configuring the DIP setting with a serial port command to anything but CLASSIC BEACON (zero) will disable the hardware DIP switch.</p>
<p>In the table below, default settings are shown in <b>boldface</b>. Serial command arguments may be abbreviated using the first letter of the word. For example: <b>> DIP CLASSIC BEACON</b> can be shortened to <b>> DIP C B</b>.</p>