I am using a TSU9600 to control a RFX9600. This RFX9600 uses serial control for a Denon 4306 Receiver, an Elan V883 component Switcher, and hopefully, a Denon 1930ci DVD player.

I had no trouble controlling the Elan piece using the following settings:

Command: Output1 Input 1

Baud:19200
Parity: None
Data Bits: 8
Stop Bits: 1

Send:1
Repeat until: 100ms

ACSII Command: '&V883,KEY,006\r'

No Problem for the Elan piece.

No Problem with the Denon Receiver:

Command: Power On

Baud:9600
Parity: None
Data Bits: 8
Stop Bits: 1

Send:1
Repeat until: 100ms

ACSII Command: 'PWON\r'

I am having problems with the Denon DVD player. It appears I could use the hex format to control the DVD, but, I would think, since I am using one way communication that an ASCII set would work. Any help in this regard would be appreciated.

Attempted Command: Power off

Command: Power Off

Baud:9600
Parity: Even
Data Bits: 8
Stop Bits: 1

ACSII Command: '!\r'

I feel like am missing some kind of prefix, and suggestions on the ASCII front?

The DVD players do not work the same as the receivers.

Download the 232 protocol for any of the Denon DVD players for the documentation.

The strings work like this (shown in hex...convert to ASCII where possible if needed...

02 (Stx=start hex)
XX (command code, hex or ASCII)
XX (Parameter code 0)
XX (Parameter code 1)
XX (Parameter code 2)
XX (Parameter code 3)
03 (Etx=end hex)
XX (BCCH -Batch check character high)
XX (BCCL -Batch check character low)

To figure the batch check characters do the following...

with a scientific calculator in hex mode add the command code, any parameter codes and the Etx to get a check sum hex number (do not add the Stx). Take the left character, treat it as an ASCII character and convert it to hex. This is your BCCH. Do the same for the right character of the checksum hex number. This is your BCCL. If the check sum is a three digit hex number, ignore the middle character.

Play: 02 40 00 00 00 00 03 34 33

In RTI software I would enter this when using ASCII: \x02@\x00\x00\x00\x00\x0343
or... \x02@\x0343

\x02=02 hex (there is no ASCII equivalent for 02h)
@=40 hex=play command
\x00=00 hex (there is no ASCII equivalent for 00h)
4(ASCII)=34 hex=BCCH
3(ASCII)=33 hex=BCCL

Check sum example... 40h+03h=43h.
4 ASCII = 34h
3 ASCII = 33h

I didn't manage to get it working too. Maybe I can with the info of tgrugett, I'll try tonight (it's 15:23 here now).

I edited my post for further clarification.

Thanks tgrugett, I ran out of time on the job. So I just used IR to control the DVD player, lazy by necessity. Hopefully, I will find the time to try using the hex-code on a follow up. A note to anyone doing a RS232 thread search, and of course always good advice. Update the TSU9600's firmware as soon as you take it out of the box. I was definitely getting transmission errors with the original firmware. Other than that the con toll was dead on perfect, as long as you got a WiFi signal.

Baud Rate:9600
Parity: Even (Only for DVD, AVR None)
Data Bits: 8
Stop Bits: 1

Working:
on \x02 \x00\x00\x00\x00\x0323
off \x02!\x00\x00\x00\x00\x0324
play \x02@\x00\x00\x00\x00\x0343
stop \x02A\x00\x00\x00\x00\x0344
pause \x02B\x00\x00\x00\x00\x0345
skip forward \x02C+\x00\x00\x00\x0371
skip backward \x02C-\x00\x00\x00\x0373
ff \x02D+\x00\x00\x00\x0372
fr \x02D-\x00\x00\x00\x0374
setup \x02E\x00\x00\x00\x00\x0348
topmenu \x02F\x00\x00\x00\x00\x0349
menu \x02G\x00\x00\x00\x00\x0350
return \x02H\x00\x00\x00\x00\x0351
audio \x02I+\x00\x00\x00\x0377
subtitle \x02J+\x00\x00\x00\x0378
angle \x02K+\x00\x00\x00\x0379
left \x02M\x31\x00\x00\x00\x0381
up \x02M\x32\x00\x00\x00\x0382
right \x02M\x33\x00\x00\x00\x0383
down \x02M\x34\x00\x00\x00\x0384
cd \x02O\x31\x00\x00\x00\x0383
sacd stereo \x02O\x32\x00\x00\x00\x0384
sacd multi \x02O\x33\x00\x00\x00\x0385
enter \x02N\x00\x00\x00\x00\x0351

Are you sure about the Baud Rate?

My documentation for the DVD1930CI is 9600 (9600e81)

You are right, I copied it from the startpost and forgot to edit it, but I use 9600, edited it in the previous post now and put in some extra samples. But thanks for your info!!! I finally get it now!

Does someone know why these don't work?
up \x02M1\x00\x00\x00\x0387
down \x02M2\x00\x00\x00\x0388
left \x02M3\x00\x00\x00\x0389
right \x02M4\x00\x00\x00\x0390
cd \x02O1\x00\x00\x00\x0389
sacd stereo \x02O2\x00\x00\x00\x0390
sacd multi \x02O3\x00\x00\x00\x0391

edit, I probably should use hex for 1

I don't know why your codes don't work, but these in hex work on my DVD2930:
Up: 02 4D 32 00 00 00 03 38 32
Down: 02 4D 34 00 00 00 03 38 34
Left: 02 4D 31 00 00 00 03 38 31
Right: 02 4D 33 00 00 00 03 38 33

Hope my 1st post helps!

Very helpfull, I found my mistake.

I'm having trouble with direct, let's take 1 as an example.

02 40 00 00 00 00 03 34 33 is what I think it should be in hex, but it doesn't work, and in ASCII I really don't know how to do B2.

02 4C 32 00 00 31 03 42 32

02 Stx
4C Direct Select Command
32 Track/Chapter Mode
00 100 digit (N/A)
00 10 digit (N/A)
31 1 digit (1)
42 BCCH
32 BCCL

You did not have the correct command code or parameter codes unless you are refering to a different command.

40 is for play.

I had 02 4C 32 00 00 31 03 42 32 (42 32 = B2) I copied the wrong command, doesn't work.

I do not have a rig to test at the moment but that should be the correct string.

In ASCII: \x02L2\x00\x001\x03B2

What are you trying to do... select the first chapter on a DVD?
Perhaps the disc configuration is preventing you from jumping to chapter 1.
Did you try jumping from chapter 2 back to chapter one after the disc is playing or were you trying to select the chapter from the disc intro or menu?
A good way to test is to use an audio CD instead of a DVD so that you can avoid any disc specific issues.