Fixed - You have to use void before() and place it before void presentation() void before() { pinMode (4, OUTPUT); digitalWrite(4, HIGH); } void presentation() { // Send the Sketch Version Information to the Gateway Serial.print("Send Sketch Info: "); sendSketchInfo(SKETCH_NAME, SKETCH_VERSION); Serial.print(SKETCH_NAME); Serial.println(SKETCH_VERSION); wait(LONG_WAIT);