Matter example patch (#10618)

* feat(matter): adjust preferences labels in matter examples

* feat(matter): adjust preferences labels in matter examples

* fix(matter_example): extra blank space in code added by mistake

* feat(matter_example): use const char * instead of #define

* feat(matter_example): use const char * instead of #define

* feat(matter_example): change Preferences names

* fix(matter_example): missing semicolon in code

libraries/Matter/examples/MatterDimmableLight/MatterDimmableLight.ino

@@ -22,7 +22,9 @@
 MatterDimmableLight DimmableLight;
 
 // it will keep last OnOff & Brightness state stored, using Preferences
-Preferences lastStatePref;
+Preferences matterPref;
+const char *onOffPrefKey = "OnOffState";
+const char *brightnessPrefKey = "BrightnessState";
 
 // set your board RGB LED pin here
 #ifdef RGB_BUILTIN
@@ -51,8 +53,8 @@ bool setLightState(bool state, uint8_t brightness) {
     digitalWrite(ledPin, LOW);
   }
   // store last Brightness and OnOff state for when the Light is restarted / power goes off
-  lastStatePref.putUChar("lastBrightness", brightness);
-  lastStatePref.putBool("lastOnOffState", state);
+  matterPref.putUChar(brightnessPrefKey, brightness);
+  matterPref.putBool(onOffPrefKey, state);
   // This callback must return the success state to Matter core
   return true;
 }
@@ -86,11 +88,11 @@ void setup() {
   delay(500);
 
   // Initialize Matter EndPoint
-  lastStatePref.begin("matterLight", false);
+  matterPref.begin("MatterPrefs", false);
   // default OnOff state is ON if not stored before
-  bool lastOnOffState = lastStatePref.getBool("lastOnOffState", true);
+  bool lastOnOffState = matterPref.getBool(onOffPrefKey, true);
   // default brightness ~= 6% (15/255)
-  uint8_t lastBrightness = lastStatePref.getUChar("lastBrightness", 15);
+  uint8_t lastBrightness = matterPref.getUChar(brightnessPrefKey, 15);
   DimmableLight.begin(lastOnOffState, lastBrightness);
   // set the callback function to handle the Light state change
   DimmableLight.onChange(setLightState);

libraries/Matter/examples/MatterOnOffLight/MatterOnOffLight.ino

@@ -22,7 +22,8 @@
 MatterOnOffLight OnOffLight;
 
 // it will keep last OnOff state stored, using Preferences
-Preferences lastStatePref;
+Preferences matterPref;
+const char *onOffPrefKey = "OnOffState";
 
 // set your board LED pin here
 #ifdef LED_BUILTIN
@@ -48,7 +49,7 @@ bool setLightOnOff(bool state) {
     digitalWrite(ledPin, LOW);
   }
   // store last OnOff state for when the Light is restarted / power goes off
-  lastStatePref.putBool("lastOnOffState", state);
+  matterPref.putBool(onOffPrefKey, state);
   // This callback must return the success state to Matter core
   return true;
 }
@@ -82,8 +83,8 @@ void setup() {
   delay(500);
 
   // Initialize Matter EndPoint
-  lastStatePref.begin("matterLight", false);
-  bool lastOnOffState = lastStatePref.getBool("lastOnOffState", true);
+  matterPref.begin("MatterPrefs", false);
+  bool lastOnOffState = matterPref.getBool(onOffPrefKey, true);
   OnOffLight.begin(lastOnOffState);
   OnOffLight.onChange(setLightOnOff);