[lcn] Improve readme; Allow special module IDs <5 (#10770)

Signed-off-by: Fabian Wolter <[email protected]>

bundles/org.openhab.binding.lcn/README.md

@@ -249,6 +249,10 @@ After the colon, the LCN "hit type" follows: HIT, MAKE or BREAK (German: kurz, l
 
 If multiple keys or key tables are programmed in a single "send keys" command, multiple triggers will be executed.
 
+> Notice: Don't test the command with the "Test command" button in LCN-PRO.
+This will send a command from LCN-PRO to openHAB, but openHAB expects the module as the sender.
+Simply press the physical button at the module for testing.
+
 ### Remote Control
 
 To evaluate commands from LCN remote controls (e.g. LCN-RT or LCN-RT16), the module's I-port behavior must be configured as "IR access control" within *LCN-PRO*:

bundles/org.openhab.binding.lcn/src/main/resources/OH-INF/config/config.xml

@@ -43,7 +43,7 @@
 	</config-description>
 
 	<config-description uri="thing-type:lcn:module">
-		<parameter name="moduleId" type="integer" required="true" min="5" max="254">
+		<parameter name="moduleId" type="integer" required="true" min="1" max="254">
 			<label>Module ID</label>
 			<description>The module ID, configured in LCN-PRO</description>
 		</parameter>
@@ -58,7 +58,7 @@
 			<label>Group Number</label>
 			<description>The group number, configured in LCN-PRO</description>
 		</parameter>
-		<parameter name="moduleId" type="integer" required="true" min="5" max="254">
+		<parameter name="moduleId" type="integer" required="true" min="1" max="254">
 			<label>Module ID</label>
 			<description>The module ID of any module in the group. The state of this module is used for visualization of the
 				group as representative for all modules.</description>