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

void loop() {
  for (int i=32; i<128; i++){
    Serial.print("ASCII ");
    Serial.print(i);
    Serial.print("= ");
    Serial.print(char(i));
    Serial.println(" ");
    delay(100);
  }
  Serial.println(" ");
  delay(3000);
}