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    Axon II Microcontroller

    Setting Up Hardware

    Part #1: Installing Software
    Part #2: Setting up Hardware
    Part #3: Using the Bootloader

    STEP 1: Install USB Drivers

    To use the USB for the first time you must first install the USB driver file. Simply download the .exe file appropriate for your operating system and install it.

    Next, plug in your USB cable (you do not need to power the Axon II to do this).

    USB Connection

    Your computer should now detect the new hardware and ask you about drivers for the CP2102 (the USB converter chip on the Axon). Follow the installer directions given until complete.

    STEP 2: Connect Power

    Now you must plug in your battery. Look for the pin labeled 'Bat' on your Axon II at the top-left side. The middle pin is always for power, and the outside pin is always for ground.

    A 6V NiMh battery with Hitec connector is recommended, but you can also use 7.2V and/or a NiCad battery type. Be aware that most servos will over heat at greater than 6V.

    See the Axon II datasheet for more info on voltage/current tolerances.

    Battery Connection

    STEP 3: Test USB

    Download this hyperterminal config file, then double click it.

    For instructions on configuring it correctly, check out my hyperterminal tutorial.

    Select your COM port and baud rate (115.2kbps), then click connect. You should immediately start seeing data.


    Remember, if your receiving junk data, that means you improperly set up the baud rate but everything else is working fine. It also means you should read the FAQ on UART gibberish.

    If you don't like HyperTerminal, another popular terminal program to try is Tera Term.

    Notes: To learn more about BAUD rates, read the UART tutorial. To determine the correct COM port, in Windows, click:
    Start->Settings->Control Panel->System
    A new window will come up called 'System Properties'. Open the Hardware tab and click 'device manager'. A new window should then pop up. Click 'Ports (COM & LPT)', and check the COM for CP210x.

    STEP 4: Connect Sensors & Servos

    Servos can be connected to any left and bottom headers of the Axon II. Ground (black wire) is always the outside row, and red (power) is always the center row. Axon II servo connection

    Analog sensors, such as the Sharp IR Rangefinder should always be connected to the regulated 5V bus (unless they are 3.3V sensors). The 5V bus (ADC #0-15, and A0-A2) is located on the top and right header rows of the Axon.

    Axon II sensor connection

    Connect 3.3V sensors to the 3.3V output line. IMPORTANT: Read the Axon II datasheet for voltage tolerances first, or you may end up frying your USB. You'll also notice that right next to the 3.3V output is I2C.

    Axon II 3.3V Output

    STEP 5: Connect UART

    The UART is a way for the Axon II to communicate with other hardware through serial, such as a camera, bluetooth, or GPS. It's as easy as plug and play.

    T is for transmit, R is for receive, and G is for ground (make sure external devices share a common ground!).

    Axon II UART Connection

    There are four total available UART ports, but the USB uses one of them.

    STEP 6: Mount Axon II to Robot

    It is recommended to mount your Axon II to your robot using spacers at least .25" long. Here is an example with 1" spacers and four screws (not included):

    Axon II Mounted to Robot

    STEP 7: Mount the On/Off Switch

    The included on/off switch has a plate that can be removed to help you mount it to your robot in an easy to reach location.

    Unscrew Switch

    Here is an example of it mounted to the ERP:

    Mounted Switch

    Now that you are done setting up hardware, continue to
    Part #3: Using the Bootloader >>>

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