fix: do not release camera or cannot take second photo

led_control.py

@@ -99,10 +99,8 @@ def parse_s3_url_payload(payload):
 
 
 def take_picture():
-    #cam.open()
     ret, frame = cam.read()
     ret, img = cv2.imencode(FORMAT, frame)
-    cam.release()
     return img.tobytes()