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3.4.1 Connecting owa4x to a PC
3.4.1.1 Serial connection
Either Linux OS or Windows OS can be used to connect to the device from a
Personal Computer (PC) through serial port. The required configuration
parameters are the following:
• Bit Rate: 115200 bps
• Data Bits: 8
• Parity: none
• Bit Stop: 1
• Flow Control: None
3.4.2 Windows Hyperterminal
Use Windows HyperTerminal to connect owa4x to the PC configuring the serial
port parameters to the values indicated in previous section.
Switch on the owa4X. Once the Kernel is loaded in RAM memory and the
system is up, the device waits for the user to enter a valid user name to log in.
This user name is root and the password is root. There is also another user,
“debian” and password “temppwd”.
Once logged in, the user is in the owa4X file system which has the directory
structure of a usual Linux distro, on this case Debian Jessie.
To transfer a file from the PC to the owa4x, change to /home directory or to the
directory where the file is to be stored (cd /home or cd /directory_name), type rz
command and choose Transfer-> Send File… option of the HyperTerminal.
To transfer a file from the device to the PC, change to the directory where the
file is, then type sz command indicating the name of the file (sz file_name) and
choose the Transfer -> Receive File… option of the HyperTerminal. File transfer
protocol is zmodem in both cases.
3.4.3 Linux Minicom
Run the minicom program and configure the serial port parameters to the
values indicated in previous section. Minicom help is showed by typing Ctrl-A Z.
Serial port device files (/dev/ttyS0, /dev/ttyS1…) must have reading and writing
permissions for all users. Log in as root and type chmod a+rw /dev/ttySx to
change permissions.
Switch on the owa4x and wait until login prompt appears. Log in as root user
with password “root” to enter into the device Operating system.
To transfer a file from the local PC to the device, change to /home directory (or
to the directory where the file is to be stored), type rz command in owa4x OS,
type Control-A S so that the minicom knows the file that is to be transferred.
The file transfer protocol is zmodem.
To transfer a file from the device to the local PC, change to the directory where
the file to be transferred is stored, type sz command indicating the name of the
file (sz file_name) and type Control-A R so that the minicom starts to receive
the file. The file transfer protocol is also zmodem.
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General