What does this error mean??

Projects Programming
1

This is my program :

#include <Servo.h>

int LedPin1 = 12;
int LedPin = 13;
int MotorPin1 = 9;
int MotorPin2 = 10;
int servoPin = 6;

Servo VishalServo;

void setup()
{
digitalWrite(LedPin, HIGH);
Serial.begin(9600);
Serial.println("Robotic tank");
pinMode(LedPin, OUTPUT);
pinMode(LedPin1, OUTPUT);
pinMode(MotorPin1, OUTPUT);
pinMode(MotorPin2, OUTPUT);
VishalServo.attach(servoPin);
VishalServo.writeMicroseconds(1500);
Serial.println("Wait for 1 second");
delay(1000);
Serial.println("You can now give commands");
}

void loop()
{
while (Serial.available() == 0);
int val = Serial.read() - '0';

int i = VishalServo.read();

if (val == 2)
{
Serial.println("Robot is On");
digitalWrite(MotorPin1, HIGH);
digitalWrite(MotorPin2, HIGH);
VishalServo.writeMicroseconds(1500);
delay (500);
VishalServo.writeMicroseconds(1500);
digitalWrite(MotorPin1, LOW);
digitalWrite(MotorPin2, LOW);
delay(5);
}

if (val == 1)
{
Serial.println("Robot is turning left");
digitalWrite(MotorPin2, HIGH);
VishalServo.writeMicroseconds(1500);
delay(500);
VishalServo.writeMicroseconds(1500);
digitalWrite(MotorPin2, LOW);
delay(5);
}

if (val == 3)
{
Serial.println("Robot is turning right");
digitalWrite(MotorPin1, HIGH);
VishalServo.writeMicroseconds(1500);
delay(500);
VishalServo.writeMicroseconds(1500);
digitalWrite(MotorPin1, LOW);
delay(5);
}

if (val == 9)
{
Serial.println("Turning left");
VishalServo.write(i+5);
delay(5);
}

if (val == 7)
{
Serial.println("Turning right");

if (i => 170)
{
delay(5);
}

if(i =< 170)
{
VishalServo.write(i-5);
delay(5);
}
}

if (val == 5)
{
Serial.println("Shoot");
digitalWrite(LedPin1, HIGH);
delay(50);
digitalWrite(LedPin1, LOW);
delay(5);
}

if (val == 8)
{
Serial.println("Centering");
VishalServo.writeMicroseconds(1500);
delay(5);
}

else
{
delay(5);
}
}

And this is the error:

Main_robot.cpp: In function 'void loop()':
Main_robot:79: error: expected primary-expression before '>' token
Main_robot:84: error: expected primary-expression before '<' token

Could you please tell me how to get rid of this error.
Thanks

2

Are you sure that is your entire program?

By the looks of the error, it is talking about a library called Main_robot, which I do not see included nor refered to in the sketch.

3

Yes it is my whole program and the smily is "8"

4

Main_Robot is the name of the file when I saved it...I saved this file as Main Robot...

5

Ok that makes perfect sense then.

if (i => 170)
  {
    delay(5);
  }
  
  if(i =< 170)
  {
  VishalServo.write(i-5);
  delay(5);
  }

That is the issue.

it should be >= and <=, you have the = sign first, when it should be 2nd in both cases.

6

Yup that works just fine

Thanks