Communication with ITU-232 via RS232 is done with simple ASCII commands. The port settings are: 38400
baudrate, 8 databits, no parity, handshake off. These parameters cannot be changed. The physical
connection is made with a straight through wired 9 pin serial cable (NO null modem cable!) Maximum wire
length depends on cable quality and influence caused by external interference.
Pin 2: TX data : data transmission output.
Pin 3: RX data : data transmission input.
Pin 5: GND : ground
Other pins are not used.
From here we assume that you are familiar with RS232 communication protocols and hardware. If not, please
read the user manual of your control device first. In case you are experiencing a problem with serial
communication, start at the basics, connect a computer with a working serial port, use the right serial cable,
use a simple terminal program, make communication settings and start from there.
Please note that most commands sent from the infrared remote control will also be shown on the serial port.
This is the easiest way
RS232 Commands
RS232
COMMAND
LIST
ON
OFF
IR
(
INTERNET
RADIO
)
FM
MEDIA
PRESET
1
(
FOR
FM
/
IR
)
....
....
....
PRESET
10
(
FOR
FM
/
INTERNET RADIO
)
UP
(
FOR
FM
BY
0
.
05MHZ
STEP
)
DOWN
(
FOR
FM
TUNING-
BY
0
.
05MHZ
STEP
)
PLAY
PAUSE
STOP
SKIP+
(
FOR
FM
AUTO
SEARCH
NEXT
STATION
,
FOR
MEDIA
SKIP+
1
TRACK
)
SKIP-
(
FOR
FM
AUTO
SEARCH
RPEVIOUS
STATION
,
FOR
MEDIA
SKIP-
1
TRACK
)
VOL+
VOL-
REPEAT
ON
REPEAT
OFF
MUTE
P19