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Author Topic: DCS-936L Motion detection false alarms - Part 2  (Read 3352 times)

Steve123

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DCS-936L Motion detection false alarms - Part 2
« on: March 01, 2017, 08:11:32 PM »

As the original thread looks to be locked, just starting a new thread to add my voice to the list of people reporting that the motion detection feature does not work on the DCS-936L. I had no problem upgrading to the latest firmware, but no change in behavior.

Problem: most emailed events are false alarms, and most real events are completely missed. Changing the detection area and sensitivity over the course of a couple of days managed to get an occasional real event at best.

The video quality is great compared to the older models, but unfortunately the motion detection doesn't work at all like the older models. Running the unit side-by-side with a 932L & DCS-930L for comparison.

Has D-Link acknowledged the issue yet? Is anyone in engineering actively working on? Or do I need to give up and return the camera?

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FurryNutz

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #1 on: March 01, 2017, 08:37:35 PM »

Information has been passed to D-Link for review. I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this. We find that phone contact has better immediate results over using email.
Let us know how it goes please.
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cgmendla

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #2 on: March 02, 2017, 04:24:22 PM »

I just want to add my .02's worth. The way the unit is now, it's worse than worthless. I turned the sensitivity up to 50 percent (It Was windy today and the unit is under the garage eve looking at the driveway and door).

Results
- no less than 50 false alarms for SUBTLE changes in the darkness of the driveway.
- Did manage to catch my 4400 pound truck pull out with my lights on.
- Missed my son (Big guy - weightlifter) getting into his car and pulling out of the driveway - The car is 10' from the camera
- Missed the mailman -- Maybe he's a ninja or an alien with stealth invisibility powers.. I'm beginning to wonder.
- Missed my truck coming into the driveway in daylight but it did catch me coming out.
- I walked in a 10' circle in front of the camera five time - Nada Nyet, Zilch, Zero.
- I walked right up to it and give it the finger.. it caught that.
- Lowered the sensitivity to 30 percent to reduce false alarms.
- It missed me getting back into the truck to head out in daylight and pull out. in daylight.
- Got another half dozen false alarms.
- Came back and OMG - It recorded the truck coming in with my top end high beams on .. I can only hope any potential evil doers will come in with four halogen headlights strapped to their head.
-  Missed me unloading groceries.
- missed me making 3 trips to take out the trash and recycles.

Who the hell did you have design this thing?? The international association of house burglars?? I could hire a legally blind person for security and get better results.

Seriously guys, something is seriously wrong with your motion detection algos.. It's almost as though they are doing the inverse of what they are supposed to do.

Update - My son just came into the driveway with his high beams on and it recorded that..

 
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RYAT3

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #3 on: March 02, 2017, 05:33:04 PM »


Do you have the entire image selected? Can you scale it back?   like maybe a line to cross instead of an entire area?

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cgmendla

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #4 on: March 02, 2017, 05:34:35 PM »

@ Ryat - I'll give that a shot.
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FurryNutz

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #5 on: March 03, 2017, 06:27:48 AM »

Is this unit outside up under the eve?

I just want to add my .02's worth. The way the unit is now, it's worse than worthless. I turned the sensitivity up to 50 percent (It Was windy today and the unit is under the garage eve looking at the driveway and door).


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cgmendla

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #6 on: March 03, 2017, 08:13:20 PM »

Yes it is.. I'm about to give up on it. The signal to noise ratio is horrible. It keeps sending false alarms when it seems to be adjusting.  I'll see if Dlink will exchange it for one of the outdoor models but I'll check the forum for that model first.

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cgmendla

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #7 on: March 03, 2017, 08:15:23 PM »


Do you have the entire image selected? Can you scale it back?   like maybe a line to cross instead of an entire area?

Ryat3 - I tried your suggestion and scaled back the motion area.. All I can say is thank God I have unlimited data on my phone.. I was getting a trigger every 10 minutes or so all day.. And it still missed the mailman.. This camera is absolutely useless.


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FurryNutz

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #8 on: March 03, 2017, 08:22:15 PM »

Ya this camera isn't designed or supported for out door use.  ::)
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cgmendla

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #9 on: March 03, 2017, 08:42:21 PM »

I was considering moving it to my basement but I'm wondering if I'd have the same false detection issues given that I have windows on 2 sides. The basement is below grade but the one wall faces south. I think I'll see if I can pick up an outdoor camera tomorrow and move the 936 to the basement or garage.


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FurryNutz

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #10 on: March 05, 2017, 12:00:47 PM »

Let us know how it goes with the new placement.
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xilistik

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #11 on: March 29, 2017, 01:25:16 PM »

My advice Steve123 is give up. You wasted your money on a camera that does not work as advertised. Try a different model. Most of them seem to work well. I am experiencing exactly the same problems you are.
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FurryNutz

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Re: DCS-936L Motion detection false alarms - Part 2
« Reply #12 on: March 29, 2017, 01:34:50 PM »

Thank you for the feed back. This issue is under review by D-Link. I hope that next FW update may addresses these issue.
For those who can't wait for the next update, please make contact with D-Link support on the phone and talk to them about your concerns and or return the camera to place of purchase.

Thank you.

My advice Steve123 is give up. You wasted your money on a camera that does not work as advertised. Try a different model. Most of them seem to work well. I am experiencing exactly the same problems you are.
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FurryNutz

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