First init.

libraries/Adafruit_seesaw_Library/examples/communication/UART_loopback/UART_loopback.ino

@@ -0,0 +1,31 @@
+//This example takes UART data given to the seesaw, reads it and then loops it back
+
+#include "Adafruit_seesaw.h"
+
+Adafruit_seesaw ss;
+
+void setup()
+{
+  Serial.begin(9600);
+  
+  if(!ss.begin()){
+    Serial.println("ERROR!");
+    while(1) delay(1);
+  }
+  else Serial.println("seesaw started");
+
+  //enable interrupt
+  ss.enableSercomDataRdyInterrupt();
+}
+
+void loop()
+{
+  if(!digitalRead(3)){
+    char c = ss.readSercomData();
+    Serial.print(c); //print to arduino console
+
+    //delay after reading data
+    delayMicroseconds(100);
+    ss.print(c); //send back to the seesaw to print
+  }
+}