Index: sources/device/DeviceModels.h
===================================================================
diff -u -r97d593e2e7adb36f2f9f97f9bb9958dcef740bc1 -rf38edd22f7b63694c21b83d6f4b69ea618390126
--- sources/device/DeviceModels.h	(.../DeviceModels.h)	(revision 97d593e2e7adb36f2f9f97f9bb9958dcef740bc1)
+++ sources/device/DeviceModels.h	(.../DeviceModels.h)	(revision f38edd22f7b63694c21b83d6f4b69ea618390126)
@@ -79,16 +79,23 @@
 
 
 // ------------------------------------------------------------------
-
+// TODO : I believe the two model can be merged. They have so much in common.
+//        On the CANBus it was separated since the type of data in send and receive was totally different.
+//        But here it's the same.
 class MDeviceBrightnessRequest : public MDeviceRequestBase {
 public:
+    static const quint8 mBrightness_min    =  2;
+    static const quint8 mBrightness_max    = 10;
+    static const quint8 mBrightness_res    =  2;
 
     struct Data {
-        quint8 mBrightnessPercent = 100;
+        quint8 mBrightness_old          = mBrightness_min   ;
+        quint8 mBrightness_val          =  0;
+
+        quint8 mBrightnessPercent   = 100;
+        bool   mRead                = false;
     } _data;
 
-    explicit MDeviceBrightnessRequest(const Data &vData) : _data(vData) { }
-
     QString toString() {
         return MDeviceRequestBase::toString("DeviceBrightness", { _data.mBrightnessPercent });
     }