diff --git a/arduino/PayloadOK.ino b/arduino/PayloadOK.ino
new file mode 100644
index 00000000..21397704
--- /dev/null
+++ b/arduino/PayloadOK.ino
@@ -0,0 +1,25 @@
+  int counter = 0;
+  
+  void setup() {
+  Serial1.begin(9600);
+  pinMode(PC13, OUTPUT);
+    digitalWrite(PC13, LOW);   // turn the LED on 
+    delay(50);              // wait for a second
+    digitalWrite(PC13, HIGH);    // turn the LED off
+   
+}
+
+void loop() {
+
+  if (Serial1.available() > 0) {
+    digitalWrite(PC13, LOW);   // turn the LED on
+    delay(50);              // wait for a second
+    digitalWrite(PC13, HIGH);    // turn the LED off
+    char result = Serial1.read();
+//    Serial1.println(result);
+    Serial1.println("OK");
+//  Serial1.println(counter++);    
+  }
+  
+  delay(100);
+}