Argent Data Systems
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USB
The USB mini-B connector is the primary way you’ll connect the tracker to a PC. The tracker
enumerates as a composite device with both mass storage device (MSD) and communications
device class (CDC) functions. The MSD function provides access to the tracker’s internal file
system, and the CDC function allows console and KISS access through a virtual serial port.
For Mac OS X, Linux, and Windows 10, no drivers or INF files are required. For Windows versions
prior to 10, an INF file (included on the tracker’s own drive) is required for the CDC function.
Windows 8 users will need to boot with driver signing turned off to install the INF file.
On Mac OS X and Linux, the CDC serial port will typically show up as /dev/ttyACM0 if no other
CDC ACM devices are present. On Windows, you can check under ‘Ports’ in Device Manager to
find the COM port number assigned to the tracker by Windows.
The CDC serial port defaults to console mode. You can access the console using a terminal
program like PuTTY or Minicom. The baud rate setting is ignored. You should see a banner and
command prompt immediately upon opening the connection.
If KISS packets are detected on the CDC serial port, the port will enter KISS mode automatically.
This eliminates the need to manually configure the tracker for KISS operation. To exit KISS mode,
enter control-C several times until the command prompt appears.
Serial Port
The front panel male DE9 connector is an RS-232 serial port that supports baud rates up to
921600 baud. Currently the serial port is used only for weather station interfacing.
RS-485 / Modbus RTU
An RS-485 serial port is provided on the front panel terminal block. RS-485 is a long-range
multi-drop serial interface with good noise immunity. Modbus RTU is a widely-used protocol for
interfacing with devices such as sensors and relays.