Controlling LG TV with rs232 and Serial binding

Setup, Configuration and Use Scripts & Rules
1
  • Platform information:
    • Hardware: RPI3
    • OS: OpenHabian
    • openHAB version: 2.5.2

I’m trying to control my LG TV with the help of the RS232 serial port in the TV. I made a RX/TX crossover cable and with the help of a USB<>Serial adapter I got it working with my PC and a terminal.

I first tried the “LG TV Serial Binding” but this did nothing. I found a tread about the binding not working with 2.5.2. So I went on trying to accomplice my goal with the Serial binding.

I’m so far that I can change volume and turn the TV off. Bud I can’t get it to turn on again. With my pc directly connected it turn on but OpenHab won’t. I’m just trying random things now so I don’t know where to look anymore.
Can someone point my in the right direction?

This is wat I’m using right now:

Items:

Switch VolummeUp

Switch VolummeDown

Switch         PowerTV     "Tv power"   

String SerialData "Data van de serial binding"  { serial="/dev/ttyUSB0@9600,CHARSET(ASCII)"}

Rule:

rule "TvSerialData"

when

Item SerialData received update

then 

    logInfo("TV control", "Serial data: {}" , SerialData.state)

    if (SerialData.state == "a 01 OK01x"){

        logInfo("TV control", "TV aan")

        SerialData.sendCommand("")

        //sendCommand (SerialData , "\n")

    }

    else if (SerialData.state == "a 01 OK00x"){

        logInfo("TV control", "TV uit")

        SerialData.sendCommand("")

        //sendCommand (SerialData , "\n")

    }

    else if (SerialData.state == ""){

    }

    else 

    {

        createTimer(now.plusSeconds(1)) [

            //sendCommand (SerialData , SerialData.state)

        ]

    }

    //SerialData.sendCommand("")

    //sendCommand (SerialData , "\n")

end

rule "TvAan"

when

Item PowerTV received update

then 

    if (PowerTV.state == ON){

        //sendCommand (SerialData , "\n")

        sendCommand (SerialData , "ka 01 01\n")

        

    }

    else if (PowerTV.state == OFF){

        sendCommand (SerialData , "ka 01 00\n")

        //sendCommand (SerialData , "")

        //SerialData.postUpdate("ka 01 00")

    }

end

rule "Volume up"

when

    Item VolummeUp received update

then 

    logInfo("TV control", "Vol UP")

    sendCommand (SerialData , "mc 01 02\n")

end

Thank you in advance!

Greetings,
Sander

2

Whel, I found the problem.
I should end my command with \r instead \n. Now it works and I can continue with this little project.

So,
"ka 01 01\n"
Does not work.

"ka 01 01\r"
Does work.

No idea why \n works when the tv is on.

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