[SOLVED] Homematic: Not able to send text to HM-Dis-EP-WM55 with a rule

Setup, Configuration and Use Beginners
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5

I analyzed the problem further with Homegear Manager. With this tool I can send text to the device to the individual channels.

For example when using Homegear Manager and I’m sending TEXTLINE_1 and TEXTLINE_2 for the MASTER parameterset on channel 1 the lower two lines of the device are updated. The homegear log is showing the following output:

02/12/19 20:45:14.804 RPC Server (Port 2001): Info: Client number 593 is calling RPC method: putParamset (1) Parameters:
(String) PEQ0177958:1
(String) MASTER
(Struct length=2)
{
[TEXTLINE_1]
{
(String) 1-TXT-1
}
[TEXTLINE_2]
{
(String) 1-TXT-2
}
}

I tried to map the paramters to my openhab item definitions like this:

String LineLowerAbove “Lower Text above line” { channel=“homematic:HG-HM-Dis-EP-WM55:25573ee2:PEQ0177958:1#TEXTLINE_1” }
String LineLowerBelow “Lower Text below line” { channel=“homematic:HG-HM-Dis-EP-WM55:25573ee2:PEQ0177958:1#TEXTLINE_2” }
Switch Submit “Submit” { channel=“homematic:HG-HM-Dis-EP-WM55:25573ee2:PEQ0177958:1#SUBMIT” }

if I use the item defintions above in my rule still nothing is sent to homegear.

I have to say I don’t completly understand what I’m doing in the openhab item definitions. Do I have to refer to the MASTER parameterset? Why does this thread mention a parameter DISPLAY_LINE1 (not TEXTLINE_1) ?