Controlling the servo motor via the Serial Monitor

In the previous section, we verified the following:

• Whether the Arduino can connect to the internet
• Whether the Arduino can send and receive MQTT messages via shiftr.io
• Whether the motor is working

Now, let's create an interface to control the servo from the Serial Monitor. Create a new sketch and save it as ch5_01_servo_serial.

Delete the boilerplate code that is automatically added to new sketches (the empty setup and loop functions) and replace the contents of your editor with the following code:

#include <Servo.h>
 
Servo myservo;
 
void setup() {
  Serial.begin(9600);
  myservo.attach(9);
}
 
void loop() {
  while (Serial.available() > 0) {
    int inputValue = Serial.parseInt();
    if (inputValue == 1) {
      myservo.write(180);
    } else {
      myservo.write(0);
    }
  }
}

Let's go through the code to make sure...