Pololu Maestro - Manual (Page 35)

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, 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.
The Serial Settings tab in the Maestro Control Center.
Pololu Maestro Servo Controller User's Guide © 2001–2014 Pololu Corporation
5. Serial Interface Page 35 of 73