Run Servo when detect object on OpenCV Python

Question

I want to connect OpenCV (Python) with arduino Uno when it detects a tennis ball.

OpenCV code:

import numpy as np
import cv2
import serial
face_cascade = cv2.CascadeClassifier('tennisballdetect.xml')
cap = cv2.VideoCapture(0)
while 1:
ret, img = cap.read()
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
faces = face_cascade.detectMultiScale(gray, 1.3, 5)
print(faces)
    for (x, y, w, h) in faces:
    cv2.rectangle(img, (x, y), (x + w, y + h), (255, 0, 0), 2)
detect=(x+y)/2
    print(detect)
cv2.imshow('img', img)
k = cv2.waitKey(30) & 0xff
if k == 27:
    break
cap.release()
cv2.destroyAllWindows()

# Module -2: Trigger Pyserial
if detect > 0:

     ser = serial.Serial('COM1', 9600)
     print(ser)
     ser.write('Y')
else:

   ser = serial.Serial('COM1', 9600)
   print(ser)
   ser.write('N')

My Arduino Code:

#include <Servo.h> 
int servoPin = 3;
Servo Servo1;
char incomingBit;    // for incoming serial data

void setup() {
// We need to attach the servo to the used pin number 
// Servo1.attach(servoPin);
pinMode(servoPin, OUTPUT);      // sets the digital pin as output
Serial.begin(9600);    // opens serial port, sets data rate to 9600 bps
}
void loop() {
if (Serial.available() > 0) {       // Serial.available(), which detects if 
any data has been sent to the 
                                   //serial port
 //  Serial.read() will read the incoming character and store it in 
incomingBit
    incomingBit = Serial.read();
    Serial.print("I received:  ");
    //if the value of incomingBit is ‘Y’, we need to turn the LED ‘on’, else we turn it ‘off’. So, 
    //in a nutshell,if detecting faces from a given image was successful, this will turn on the LED



            if(incomingBit == 'Y' || incomingBit == 'y') {

             // Make servo go to 0 degrees 
  Servo1.write(0); 
  delay(1000); 
 // Make servo go to 90 degrees 
   Servo1.write(90); 
 delay(1000); 
 // Make servo go to 180 degrees 
 Servo1.write(180); 
 delay(1000); 
 //exit(0);
            }
            else {
              digitalWrite(servoPin, LOW); 
            }
  }
}

Servo is correctly connected to Arduino and it is moving without serial communication. openCV is also working and detecting tennisball.

But when trying to connect OpenCV to arduino, servo is not moving. Any kind of help is appreciated.

Run Servo when detect object on OpenCV Python

0 Answers0