Servo myservo; // create servo object to control a servo
const int trigPin = 2;
const int echoPin = 4;
void setup() {
// initialize serial communication:
Serial.begin(9600);
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}
void loop() {
// and the distance result in centimeters:
long duration, cm;
pinMode(trigPin, OUTPUT);
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(20);
digitalWrite(trigPin, LOW);
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
// convert the time into a distance
cm = microsecondsToCentimeters(duration);
// the condition for the distance
if ( cm > 7 && cm < 14)
{
myservo.write(140); // sets the servo position according to the scaled value
delay(4000);
}
else if ( cm < 8)
{
myservo.write(40); // sets the servo position according to the scaled value
delay(100);
}
else
{
myservo.write(40); // sets the servo position according to the scaled value
delay(100);
}
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);
}
long microsecondsToCentimeters(long microseconds) {
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}
Arduino: 1.8.15 (Windows 10), Board: "Arduino Uno"
sketch_jun27a:1:1: error: 'Servo' does not name a type; did you mean 'Serial'?
Servo myservo; // create servo object to control a servo
^~~~~
Serial
C:\Users\jjwan\OneDrive\Documents\Arduino\sketch_jun27a\sketch_jun27a.ino: In function 'void setup()':
sketch_jun27a:13:1: error: 'myservo' was not declared in this scope
myservo.attach(9); // attaches the servo on pin 9 to the servo object
^~~~~~~
C:\Users\jjwan\OneDrive\Documents\Arduino\sketch_jun27a\sketch_jun27a.ino: In function 'void loop()':
sketch_jun27a:49:1: error: 'myservo' was not declared in this scope
myservo.write(140); // sets the servo position according to the scaled value
^~~~~~~
sketch_jun27a:59:1: error: 'myservo' was not declared in this scope
myservo.write(40); // sets the servo position according to the scaled value
^~~~~~~
sketch_jun27a:69:1: error: 'myservo' was not declared in this scope
myservo.write(40); // sets the servo position according to the scaled value
^~~~~~~
exit status 1
'Servo' does not name a type; did you mean 'Serial'?
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
