int ldr1 = A0; int ldr2 = A1; int led1 = 9; int led2 = 8; int ldr1Value; int ldr2Value; void setup() { pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(ldr1, INPUT); pinMode(ldr2, INPUT); Serial.begin(9600); } void loop() { ldr1Value = analogRead(ldr1); ldr2Value = analogRead(ldr2); //ldr1ValueMap = map(ldr1Value,0,1024,0,255); //ldr2ValueMap = map(ldr2Value, 0,1024,0,255); Serial.print("ldr1Value ="); Serial.print(ldr1Value); Serial.print("\t"); Serial.print("ldr2Value ="); Serial.println(ldr2Value); if (ldr1Value > 100 && ldr2Value > 10){ digitalWrite(led1, HIGH); digitalWrite(led2, HIGH); } if (ldr1Value < 100 && ldr2Value > 10){ digitalWrite(led1, LOW); digitalWrite(led2, LOW); } if (ldr1Value > 100 && ldr2Value < 10){ digitalWrite(led1, LOW); digitalWrite(led2, LOW); } if (ldr1Value < 100 && ldr2Value < 10){ digitalWrite(led1, LOW); digitalWrite(led2, LOW); } delay(10); }