Below is a sample set of System Tasks control applications settings for the DMM with a Sharp LCD as a sample.
Sharp - RS232.Control
To use the RS232 commands on the DMP the serial port must be set to ON and be pointed at the /dev/ttyS1 device. To check this create a System Task in the DMM to check your settings using number 1 below.If your serial port is anything other than /dev/ttyS1 use number one to set it correctly.
1 Create a system task under application
name it "RS232 ON"
request type = "set" request= init.startService_rs232=yes&rs232.device=/dev/ttyS1&mib.save=1&mng.reboot=1
2 Create system task "RS232 OFF" request type = "set" request = init.startService_rs232=no&rs232.device=/dev/ttyS1&mib.save=1&mng.reboot=1
3. Create system task "TV On" (((ascii =powr1_ _ _ + cr))) request type = "set" request = rs232.tx_hex=504F5752012020200D
4. Create system task "TV OFF" (((ascii =powr0_ _ _ +cr))) request type "set" request = rs232.tx_hex=504F575200202020OD
Thank you very much for the link to asci table. I was just looking for it. You were very helpful.
I was just about to control LG screen as well. The funny thing is that the Cisco Doc I have, does not say anything about the hexa conversion. It says 'send the hexa codes and you will get the same hexa codes from RS232'
I found that out over ehtereal.. sniffing functional Cisco Screen control .. that DMP was sent different code than output.
I HAVE A QUESTION Please.
You say I need to turn on RS232 control. So it is OFF by default and by turning it on ( DMP will reboot after that) ... it will stay turned on forever?
To turn on LG you need to enter space between the parameters.
Turn ON is 'ka 01 01' well or 'ka 1 1' is also working (in case you ID is set to 1) . Otherwise you get korean NG instead of OK.
Turn off is 'ka 01 00' and THAT you need to convet to hexa also with SPACE character 0x20
Switch to HDMI1 'xb 01 90'
That is all I need.
task "LG TV OFF" ( ka 1 01 +CR ...this is what you want DMP to send over rs232 laplink) request type "set" request = rs232.tx_hex=6B6120312030310D
This should work on all LG screens .... hopefully..
I am trying to setup the same using LG Plasmas from 32"-60" in size. I have setup all the RS232 commands listed here as well as performed the RS232 enable script, but nothing seems to work. Are there any recommended troubleshooting techniques to find a solution for this? These TV's were previously used with RS232 and Digi One SP boxes successfully.
Sukitti, we will be using option #3
After testing with a Digi One SP at the other end of the rs-232 cable (can view the output via a telnet session) I finally found the code that the 4400 would pass thru. Apparently the the extra code for the "0" for the data field (01 vs 1) was causing issues. I used rs232.tx_hex=6B61203120310D. I was then able to get it working for on, off, mute, various preset volumes, and different inputs. Thanks for all the information in this thread, it was VERY useful.
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