User Manual

5. Serial Interface

5.a. Serial Settings

The Maestro has three different serial interfaces. First, it has the TX and RX lines, which allow the

Maestro to send and receive non-inverted, TTL (0 – 5 V) serial bytes (Section 5.b). Secondly, the

Maestro shows up as two virtual serial ports on a computer if it is connected via USB. One of these

ports is called the Command Port and the other is called the TTL port.

• In Windows, you can determine the COM port numbers of these ports by looking in your

computer’s Device Manager.

• In Linux, the Command Port will usually be /dev/ttyACM0 and the TTL Port will usually be

/dev/ttyACM1 . These numbers may be different on your computer depending on how many

serial devices are active when you plug in the Maestro.

• In Mac OS X 10.7 (Lion) and later, the Maestro’s two virtual serial ports will have a name

of the form /dev/cu.usbmodem<number>, for example /dev/cu.usbmodem00654321 . The one

with the lower number is the Command Port.

This section explains the serial interface configurations options available in the Serial Settings tab of

the Maestro Control Center.

5. Serial Interface Page 46 of 102