Sample code for the Grove Protoshield Dual SPDT Switch

dual-spdt-switch-example.ino

// Plugged to socket D4 
int leftSwitch = 4;
int rightSwitch = 5;

void setup() {  
  Serial.begin(9600);
}

void loop() {
  String switchStatus = (String)digitalRead(leftSwitch)+(String)digitalRead(rightSwitch);
  Serial.println("Switch status: "+switchStatus+"\n");
  delay(1000);
}