کدتون رو به این صورت بنویسید درست میشه :
کد:void setup() { // put your setup code here, to run once: Serial.begin(9600); String rey1 = "OFF"; String rey2 = "OFF"; String rey3 = "OFF"; String rey4 = "OFF"; String text = "Relay= R1=" + rey1 + ",R2=" + rey2 + ",R3=" + rey3 + ",R4=" + rey4; Serial.println(text); } void loop() { // put your main code here, to run repeatedly: }