Problem making Line Follower - Codding

Using Arduino Programming Questions
#1

Hi,

I want to make a line follower. This is my first project and I’ve never contacted with C++ or Robotics.

I’ve made this code, and I guess it will work (make the robot follow a line), but Im having a problem somewhere, that I can’t solve.

If you know that the code won’t work, even if the error is corrected, please help me to re-start.

Here’s the code:

#include <Servo.h> 
 
Servo myservo1; 
Servo myservo2;
 
 
void setup() 
{ 
  Serial.begin(9600);
  pinMode(5, INPUT);
  pinMode(6, INPUT);
  pinMode(7, INPUT);
  
  myservo1.attach(10);
  myservo2.attach(11);

}

void loop () {
  
  int sensorValue1 = digitalRead(5);
  int sensorValue2 = digitalRead(6);
  int sensorValue3 = digitalRead(7);
  
  Serial.println(sensorValue1, DEC);
  Serial.println(sensorValue2, DEC);
  Serial.println(sensorValue3, DEC);
  
}  




  if (digitalRead(5)=1) { //Sensor Direito Preenchido, Objectivo - Esquerda
 
    myservo1.write(0); //Motor Direito Avança
    myservo2.write(0); //Motor Esquerdo Recua
   
    
  }


  if (digitalRead(6)=1) { //Sensor do Meio Preenchido
    
    myservo1.write(0); //Motor Direito Avança
    myservo2.write(128); // Motor Esquero Avança

  }



  if (digitalRead(7)=1) { //Sensor Esquerdo Preenchido, Objectivo - Direita
    
    myservo1.write(128); //Motor Direito Recua
    myservo2.write(128); //Motor Esquerdo Avança
  }

The errors are:

Sweep:33: error: expected unqualified-id before ‘if’
Sweep:42: error: expected unqualified-id before ‘if’
Sweep:51: error: expected unqualified-id before ‘if’

Thank you very much,

tgferreira.

#2

The main problem is that all of your “if(digitalRead…” lines are outside of the loop function. Bring them inside the loop function by putting them before the closing “}” on line 28.

Secondly, “digitalRead(7)=1” will not do what you want. To test for equality, you use “==” (two equals). Though in this case, you can just skip the equals entirely and say “if (digitalRead(7))”

#3