int trigPin1 = 7; //Trig - purple Jumper trigger pin of forward sensor int echoPin1 = 8; //Echo - blue Jumper echo pin of forward sensor int trigPin2 = 12; //Trig - pink Jumper trigger pin of sideward sensor int echoPin2 = 13; // echo-yellow echo pin of sideward sensor int forwardmotor=3; // forward vibrating motor int sidewardmotor=4; //sideward vibrating motor int a=A0; // voltage acroos 470ohm resistor of water sensor int buzzer=9; // piezo buzzer long duration1,duration2,dcm1,dcm2,voltaged,voltage; void setup() { //Serial Port begin Serial.begin (9600); //Define inputs and outputs pinMode(trigPin1, OUTPUT); pinMode(trigPin2, OUTPUT); pinMode(echoPin1, INPUT); pinMode(echoPin2, INPUT); pinMode(forwardmotor,OUTPUT); pinMode(sidewardmotor,OUTPUT); pinMode(a,INPUT); pinMode(buzzer,OUTPUT); } void loop() { // The sensor is triggered by a HIGH pulse of 10 or more microseconds. // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: digitalWrite(trigPin1, LOW); digitalWrite(trigPin2, LOW); delayMicroseconds(5); digitalWrite(trigPin1, HIGH); digitalWrite(trigPin2, HIGH); delayMicroseconds(10); digitalWrite(trigPin1, LOW); digitalWrite(trigPin2, LOW); duration1 = pulseIn(echoPin1, HIGH); duration2 = pulseIn(echoPin2, HIGH); // convert the time into a distance dcm1 = (duration1/2) / 29.1; dcm2 = (duration2/2) / 29.1; if (dcm1< 60) { digitalWrite(sidewardmotor,HIGH); } else{ digitalWrite(sidewardmotor,LOW); } voltaged=analogRead(a); // voltage in digital voltage=(voltaged*5)/1023; // voltage in corresponding analog if (voltage>0.7||voltage<=1.2) { analogWrite(buzzer,150);} //buzzer with moderate sound if (voltage>1.2) { analogWrite(buzzer,255);} // buzzer with sharp sound else{ analogWrite(buzzer,0);} delay(250); }