while True:
    ret, frame = video_capture.read()
    temp = str(arduino.readline())

    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    faces = faceCascade.detectMultiScale(
        gray,
        scaleFactor=1.1,
        minNeighbors=5,
        minSize=(30, 30)
        # flags=cv2.CV_HAAR_SCALE_IMAGE
    )  # ตรวจสอบหน้า

    # Draw a rectangle around the faces
    for (x, y, w, h) in faces:
        cv2.rectangle(frame, (x, y), (x+w, y+h), (0, 255, 0), 5)

    k = cv2.waitKey(1)  # รับ keyboard
    if "detect" in temp:  # ถ้า arduino ส่ง temp ที่มีคำว่า detect มาจะลงข้อมูล
        SendTemp(temp, frame)
    elif k % 256 == 27:
        # ESC pressed
        print("Escape hit, closing...")
        break

    temp = temp.replace("b'", '')
    temp = temp[0:5]
    frame = cv2.putText(frame, temp, org, font, fontScale,
                        color, thickness, cv2.LINE_AA)

    if not ret:
        print("failed to grab frame")
        break
    cv2.imshow("test", frame)