First testing tool for your LEDs and your Switches

README.md

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+= MIDI BOARD TWO
+
+== Second MIDI-Board-Project with SD-Card-Reader and LCD-Display!
+ 
+=== Testing Tool
+
+This tool is only a testing tool. If you upload it to your Arduino Device, all LEDs will be switched on. After it, you can
+switch out all the LEDs if you press all your Buttons.
+
+Only for testing your circuit.

tools/testing/README.md

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+= MIDI BOARD TWO
+
+== Second MIDI-Board-Project with SD-Card-Reader and LCD-Display!
+ 
+=== Testing Tool
+
+This tool is only a testing tool. If you upload it to your Arduino Device, all LEDs will be switched on. After it, you can
+switch out all the LEDs if you press all your Buttons.
+
+Only for testing your circuit.

tools/testing/testing.ino

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+void setup() {
+  Serial.begin(9600);
+  for(int i=22; i <= 36; i=i+2) {
+    pinMode(i, INPUT);
+    pinMode(i+1, OUTPUT);
+  }
+  
+  for(int i=22; i <= 36; i=i+2) {
+    digitalWrite(i+1, HIGH);   // turn the LED on (HIGH is the voltage level)
+    delay(100);               // wait for a second
+    digitalWrite(i+1, LOW);   // turn the LED off by making the voltage LOW
+    delay(100);
+  }
+}
+
+void loop() {
+  
+  for(int i=22; i <= 36; i=i+2) {
+    byte actState = digitalRead(i);
+    digitalWrite(i+1, actState);
+    
+
+  }
+}