@TimO this is the log of the node:
15:33:19.326> 15054 TSF:MSG:READ,0-0-23,s=1,c=1,t=26,pt=0,l=10,sg=0:231,81,100
this is the result from the rule routine:
15:39:17.479> 10919 TSF:MSG:READ,0-0-23,s=1,c=1,t=26,pt=0,l=6,sg=0:FF5E28

@TimO Perfect, is OK for RGB & RGBW... but now the datastring you send is a decimal string, not a HEX-string as they used normal, it is not a big problem to change this feature in the node script, if you want to have a decimal string.
How do you handle the white color, becaus this is not included in the datastring info. maybe by a switch and a other variable .
something like this:

Roger

@TimO Hey all, looks everything seems to work now, but now i have defined the bindings by the paper UI, and work with the rule definition as show by 'doctor64' ....
thanks for the help
Roger

@TimO Hello, i tried the RGB & RGBW , it looks ok but there are no commands that been send to the node and this for every item, a'im new in the openHab world, so that will be the problem.
the result is the same for RGB & RGBW
my .things file:

Bridge mysensors:bridge-eth:gateway [ ipAddress="192.168.2.190", tcpPort=5003, sendDelay=200 ] {
/** define things connected to that bridge here */
light:RGBW_23_Status [ nodeId="23", childId="0", requestAck=false]
rgbwLight:RGBW_23_Color [ nodeId="23", childId="1", requestAck=false ]
dimmer:RGBW_23_Dimmer [ nodeId="23", childId="2", requestAck=false ]
}

my .items file:

Group GF_Living "Living Room" <video> (gGF)

/* Indoor Temperatures */
//Number Temperature_GF_Living "Temperature [%.1f °C]" <temperature> (Temperature, GF_Living)

Switch RGBW_23_Status "Living" (GF_Living, Lights) { channel="mysensors:bridge-eth:gateway:RGBW_23_Status"}
Dimmer RGBW_23_Dimmer "Living" <slider> (GF_Living, Lights) ["Lighting"] { channel="mysensors:bridge-eth:gateway:RGBW_23_Dimmer"}
Color RGBW_23_Color "RGBW Light" <colorwheel> {channel = "mysensors:bridge-eth:gateway:RGBW_23_Color"}

and my .sitemap file
sitemap rvms label="test rvms"
{
Frame label="RGBW Living" {
Switch item=RGBW_23_Status label="Button Switch" mappings=[ON="on",OFF="off"]
Slider item=RGBW_23_Dimmer switchSupport
Colorpicker item=RGBW_23_Color
}
}

as result we have:

and in the paperUI:

this is what the log-file shows:
2017-06-11 09:50:48.187 [INFO ] [.dashboard.internal.DashboardService] - Started dashboard at /start
2017-06-11 09:50:51.161 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'rvms.items'
2017-06-11 09:50:52.088 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'rvms.sitemap'
2017-06-11 09:50:52.187 [INFO ] [el.core.internal.ModelRepositoryImpl] - Loading model 'rvms.things'
2017-06-11 09:50:52.978 [INFO ] [basic.internal.servlet.WebAppServlet] - Started Basic UI at /basicui/app
2017-06-11 09:50:53.006 [INFO ] [arthome.ui.paper.internal.PaperUIApp] - Started Paper UI at /paperui
2017-06-11 09:50:53.073 [INFO ] [panel.internal.HABPanelDashboardTile] - Started HABPanel at /habpanel
2017-06-11 09:50:53.404 [INFO ] [assic.internal.servlet.WebAppServlet] - Started Classic UI at /classicui/app
2017-06-11 09:50:53.555 [WARN ] [.discovery.MySensorsDiscoveryService] - Cannot automatic discover thing node: 0, child: 255 please insert it manually
2017-06-11 09:50:53.558 [INFO ] [al.protocol.ip.MySensorsIpConnection] - Successfully connected to MySensors Bridge.
2017-06-11 09:55:56.976 [INFO ] [el.core.internal.ModelRepositoryImpl] - Refreshing model 'rvms.things'
2017-06-11 09:55:56.988 [WARN ] [rsAbstractConnection$MySensorsWriter] - Interrupted MySensorsWriter
2017-06-11 09:55:56.989 [WARN ] [rsAbstractConnection$MySensorsReader] - Interrupted MySensorsReader
2017-06-11 09:55:58.010 [WARN ] [.discovery.MySensorsDiscoveryService] - Cannot automatic discover thing node: 0, child: 255 please insert it manually
2017-06-11 09:55:58.020 [INFO ] [al.protocol.ip.MySensorsIpConnection] - Successfully connected to MySensors Bridge.
2017-06-11 10:08:57.483 [INFO ] [el.core.internal.ModelRepositoryImpl] - Refreshing model 'rvms.sitemap'

so what is wrong here ?
thanks in advance
Roger

Oh yes, i dit not, that was the problem, now i can start to test the RGB-RGBW , hope that i can run this
thanks for the quit reaction
Roger

@TimO Hey Tim, before i start test , i have installed OH2.1 build #925 on 2 new W8 pc's.
download the org.openhab.binding.mysensors-2.1.0-SNAPSHOT.jar file and put it in the addons folder.
result:
2017-06-10 15:01:27.812 [INFO ] [.dashboard.internal.DashboardService] - Started dashboard at /start
2017-06-10 15:01:27.922 [INFO ] [basic.internal.servlet.WebAppServlet] - Started Basic UI at /basicui/app
2017-06-10 15:01:28.031 [INFO ] [arthome.ui.paper.internal.PaperUIApp] - Started Paper UI at /paperui
2017-06-10 15:01:28.250 [INFO ] [panel.internal.HABPanelDashboardTile] - Started HABPanel at /habpanel
2017-06-10 15:01:28.281 [ERROR] [org.openhab.binding.mysensors ] - FrameworkEvent ERROR - org.openhab.binding.mysensors
org.osgi.framework.BundleException: Could not resolve module: org.openhab.binding.mysensors [182]
Unresolved requirement: Import-Package: gnu.io

at org.eclipse.osgi.container.Module.start(Module.java:434)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1582)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1562)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1533)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1476)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)[org.eclipse.osgi-3.10.101.v20150820-1432.jar:]

i cannot start the mysensors binding ...

i have installed it on 3 diff pc's, same result , can you help mee with this, i'am stucked ..

thanks in advance
kind regards

@LastSamurai
Hello, i'am trying to connect a RGBW node by the serial gateway, is there already a solution for the hexstring format in the bindings or do we need to handle the rgbw items separatly ?
kind regards
Roger