NEXDOME OBSERVATORIES NEXDOME.COM
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checking the “COM and Serial Port” listings under the devices list for the computer. Arduino
Leonardo should appear next to a COM number (Fig 5). You’ll need this information for the
setup process.
Figure 5: Port assignment for Arduino.
We will use the ASCOM POTH (Plain Old Telescope Handset) dome control freeware for these
instructions. ASCOM POTH is a Windows based program. Other control software are setup in a
similar manner.
You can download POTH from here
http://www.ascom-standards.org/Downloads
There are two things that must be done before dome rotation will work correctly. The first is
calibration. This tells the software how many steps of the motor are required to turn the dome
360 degrees. The second is “Homing”. This tells the computer which direction the dome slit is
facing.
