Jannes updates

src/main/java/com/pi4j/crowpi/applications/ButtonMatrixApp.java

@@ -92,6 +92,7 @@ public void execute(Context pi4j) {
 
         // Stop the button matrix poller now that the application has ended
         buttonMatrix.stopPoller();
+        sleep(3000);
     }
 
     private List<String> determinePlayers() {

src/main/java/com/pi4j/crowpi/applications/LedMatrixApp.java

@@ -17,6 +17,23 @@ public void execute(Context pi4j) {
         matrix.setEnabled(true);
         matrix.setBrightness(7);
 
+        for(int row = 0; row < 8;row++){
+            for(int col = 0; col < 8; col++){
+                matrix.setPixel(row, col, true);
+            }
+        }
+        matrix.refresh();
+        sleep(2000);
+
+        for(int row = 0; row < 8;row++){
+            for(int col = 0; col < 8; col++){
+                matrix.setPixel(row, col, false);
+            }
+        }
+        matrix.refresh();
+        sleep(2000);
+
+
         // Draw a cross with a circle over it using a Graphics2D lambda function
         // Further commands for Graphics2D can be found in the official Java documentation
         // This can be adjusted to draw your own symbols and images on the LED matrix

src/main/java/com/pi4j/crowpi/applications/RfidApp.java

@@ -64,7 +64,7 @@ public void execute(Context pi4j) {
             // Read `Person` object from card and print it
             try {
                 final var person = card.readObject(Person.class);
-                System.out.println("Read person from card: " + person);
+                System.out.println("Hi, " + person.firstName + ". \uD83D\uDD96");
             } catch (RfidException e) {
                 System.out.println("Could not read person from card: " + e.getMessage());
             }

src/main/java/com/pi4j/crowpi/applications/SevenSegmentApp.java

@@ -23,6 +23,24 @@ public void execute(Context pi4j) {
         segment.setBlinkRate(0);
         segment.setBrightness(15);
 
+        for(int i=0; i<4;i++){
+            segment.setDigit(i, '8');
+            segment.setDecimalPoint(i, true);
+        }
+        segment.setColon(true);
+        segment.refresh();
+
+        sleep(2000);
+
+        for(int i=0; i<4;i++){
+            segment.clear();
+            segment.setDecimalPoint(i, false);
+        }
+        segment.setColon(false);
+        segment.refresh();
+
+        sleep(2000);
+
         // Manually set some digits and symbols to demonstrate the advanced API
         segment.setDigit(0, '1'); // Place the character "1" into the first digit
         segment.setDecimalPoint(0, true); // Activate the decimal point after the first digit