Today I’ll show how you can control a servo with Visual basic. Before this project I’ve never used Visual basic so if anyone finds any mistake in my code please leave a comment here and help me improve it.

I’ve always used the Serial Monitor of the Arduino IDE to communicate with the Arduino, but today we will use a visual basic program that I’ve created. Basically in the VB program we have 4 buttons that will interact with the Arduino when we press them.

I’ll be showing a program in Visual Basic that allows the user to rotate a servo attached to the Arduino. You need to make 3 connections from the servo to your arduino:

• Red: 3.3V (depends on your Servo motor)
• Brown: Ground
• Orange: Digital Pin 9

Parts required

• Arduino UNO
• Servo motor
• Jumper wires

You can use the preceding links or go directly to MakerAdvisor.com/tools to find all the parts for your projects at the best price!

Upload the Arduino code below

/*
 * Control a servo motor with Visual Basic 
 * Created by Rui Santos, https://randomnerdtutorials.com
*/
 
#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
  Serial.begin(9600); //begins serial communication
} 
  
void loop() 
{ 
  int pos;
  if (Serial.available()){
    delay(100);
    while(Serial.available()>0){
      pos=Serial.read();     //reads the value sent from Visual Basic  
      if(pos=='0')
        myservo.write(90);   //rotates the servo 90 degrees (Left)
      else if(pos=='1')
        myservo.write(-90);  //rotates the servo 90 degrees (right)
      else if(pos=='2')
        myservo.write(180);  //rotates the servo 180 degrees (Left)
      else if(pos=='3')
        myservo.write(-180); //rotates the servo 180 degrees (right)     
    }
  } 
} 

View raw code

Run the Visual Basic script

Click here to download the Visual Basic Script

NOTE:

• When you’re using the Visual Basic Program the Serial monitor on the Arduino IDE must be closed
• You need to match the com port on your Visual Basic Code to the right com port you’re Arduino is using

I don’t know why, but YouTube cropped my video, the tast two buttons are “Rotate 180º Left” and “Rotate 180º right” .

Watch the video demonstration

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Feel free to leave a comment below if you have any questions.