I am receiving motion detected alerts at timed intervals exactly 30 minutes apart 24 hours a day. I feel like I have experimented all of the different settings for sensitivity, motion area and tried different lighting from night vision to leaving the lights on. Nothing had any change. The camera I am receiving these notices from is a D-Link 934 and it is in a locked closet with no motion from anything inside. I don't have this issue with my other camera. Thank you for any advice you can offer.