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const int SENS_PIN = A0;
const int LED_PIN = 13;
int sensorValue = 0;
boolean toggle = true;
int motorPin1 = 3; // pin 2 on L293D IC
int motorPin2 = 4; // pin 7 on L293D IC
int enablePin = 5; // pin 1 on L293D IC
int state;
int flag=0; //makes sure that the serial only prints once the state
void setup() {
// sets the pins as outputs:
pinMode(motorPin1, OUTPUT);
pinMode(motorPin2, OUTPUT);
pinMode(enablePin, OUTPUT);
// sets enablePin high so that motor can turn on:
digitalWrite(enablePin, HIGH);
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
void loop()
{ if (Serial.available())
{ Serial.read();
sensorValue = analogRead(SENS_PIN);
Serial.println(sensorValue);
digitalWrite(LED_PIN, toggle); // toggle the LED
toggle = !toggle;
}
//if some date is sent, reads it and saves in state
if(Serial.available() > 0)
{ state = Serial.read();
flag=0; }
// if the state is '0' the DC motor will turn off
if (state == '0')
{
digitalWrite(motorPin1, LOW); // set pin 2 on L293D low
digitalWrite(motorPin2, LOW); // set pin 7 on L293D low
if(flag == 0)
{
Serial.println("Motor: off");
flag=1;
} }
// if the state is '1' the motor will turn right
else if (state == '1')
{
digitalWrite(motorPin1, LOW); // set pin 2 on L293D low
digitalWrite(motorPin2, HIGH); // set pin 7 on L293D high
if(flag == 0)
{
Serial.println("Motor: right");
flag=1;
} }
// if the state is '2' the motor will turn left
else if (state == '2')
{
digitalWrite(motorPin1, HIGH); // set pin 2 on L293D high
digitalWrite(motorPin2, LOW); // set pin 7 on L293D low
if(flag == 0)
{
Serial.println("Motor: left");
flag=1;
} }
}
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