Initial commit: CODESYS tree, integration docs, Node-RED scripts.

PLC application sources (NVL, rooms, boiler), HA/Node-RED integration guide, and NVL patch utilities.

Co-authored-by: Cursor <cursoragent@cursor.com>

codesys-tree/Device/Plc Logic/Application/0.Structures/struct_room_outs.st

@@ -0,0 +1,21 @@
+(* === DECLARATION === *)
+TYPE struct_room_outs :
+STRUCT
+    l_1: BOOL;  // Light 1 control output
+    l_2: BOOL;  // Light 2 control output
+    l_3: BOOL;  // Light 3 control output
+    l_4: BOOL;  // Light 4 control output
+    l_5: BOOL;  // Light 5 control output
+    l_6: BOOL;  // Light 6 control output
+    
+    // Status feedback (read from actual relay outputs)
+    l_1_status: BOOL;  // Actual relay 1 state
+    l_2_status: BOOL;  // Actual relay 2 state
+    l_3_status: BOOL;  // Actual relay 3 state
+    l_4_status: BOOL;  // Actual relay 4 state
+    l_5_status: BOOL;  // Actual relay 5 state
+    l_6_status: BOOL;  // Actual relay 6 state
+END_STRUCT
+END_TYPE
+
+(* === IMPLEMENTATION === *)