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Re: Change SD Card

Posted: 02 Feb 2017, 21:03
by pmoore31
jueti wrote:Not yet, too busy with my daytime job which keeps me travelling over the weekend.

The network module they use is a pretty standard one. It is single banded on 2.4GHz and does not allow to work on 5GHz, but has a radio and bluetooth support built-in which Netatmo doesn't use.

I need to get back to pmoore31 for a detailed image of The big chips on the rear side, covered by the plastic. These with the square blue plaster on it are interesting ones as they might be video processor and RAM chips.

Hi

Just emailed you the requested photos as you need high res

Re: Change SD Card

Posted: 02 Feb 2017, 23:29
by jueti
Thanks pmoore31, I had a quick look at the pictures you have kindly sent an hour ago.

Now, what do we have:

The SoC – Allwinner A83T 8-core ARM Cortex-A7 processor @ either 1.8 or 2.0 GHz, equipped with 512 KB L1 cache, 1 MB L2 cache

Such main processors are being used in ultra-compact computer applications like the ones of chinese Banana Pi, a higher performance version of the well known Raspberry Pi category.

Features:
Decoding of 1080p video, incl. MPEG1/2, MPEG4, H.263, H.264, H.264 high profile 1080p@60fps, 720p@120fps, HEVC/H.265 decoder 1080p@30fps with additional software, stream formats supported like wmv, avi, flv, rm, rmvb, mpeg, ts, mp4, etc.
It supports SATA 2.0 output to storage media such as MicroSD cards

Next is the AXP813 microprocessor unit, often combined in kits with above CPU.
You can buy the micon for 20 US $ at aliexpress.com

Next the two eMMC flash memory chips which are Samsung K4B2G1646E-BCKO.
This is 2GB DDR3 SDRAM each.
You can get these for something between 0.50 to 1.00 US-$ each at
http://vanzhen.en.seekic.com/product/in ... _BCKO.html

The whole set is often used with the AP6212 wifi/bt module with 802.11 b/g/n support at 2.4GHz we have seen in your pictures yesterday.

A whole banana pi board with these components, HDMI chip, card reader, camera etc. will cost you approx. 50 US-$ in China on a single unit price.
Those devices often run Linux or Android builds and can be used as DIY micro computers.

Our Netatmo comes with less features than such Banana Pi, but with its own software, an excellent LED / IR-floodlight, a huge aluminum heat sink, all built-in an a rock solid aluminum housing.

Re: Change SD Card

Posted: 05 Feb 2017, 10:38
by Owenlars
Slim
Does sealing the sd card slot with electrical tape work? I wondered whether it might cause condensation problems. Also does anyone know definitively whether or not to grease a new sd card and if so what grease to use? There seem to be differing views on the forum.
Thanks

Re: Change SD Card

Posted: 05 Feb 2017, 10:56
by Owenlars
I found the grease Joffre specced it in the French forum Loctite Super Lube, should have searched before I wrote!

Re: Change SD Card

Posted: 05 Feb 2017, 14:38
by Slim
Owenlars wrote:Slim
Does sealing the sd card slot with electrical tape work? I wondered whether it might cause condensation problems. Also does anyone know definitively whether or not to grease a new sd card and if so what grease to use? There seem to be differing views on the forum.
Thanks
Hi

Works just fine. My SD card slot is now water and dust free :)

Actually...with this small modification, latest firmware and replacement of a high performance SD card the Presence now perform pretty decent.....so yesterday I went off and bough another one for surveillance of my boathouse :mrgreen:

Re: Change SD Card

Posted: 05 Feb 2017, 15:37
by Owenlars
Thanks Slim.
Mines working pretty well too fingers crossed. I am going to change the sd card for a 32 gig Sandisk weatherproof etcetc when I am next in the same place as the camera. I shall bring a roll of insulation tape with me as well.

Re: Change SD Card

Posted: 05 Feb 2017, 23:06
by jueti
@Slim
Good news you are reporting.
Considering your comment of "pretty decent" ...
On a scale of 1-100 how would you rate your cameras actual performance after these modifications compared to the out-of-box performance ?
Thanks.

Re: Change SD Card

Posted: 06 Feb 2017, 22:31
by Slim
Well....still far away from my expectations, but I guess I'd had too high hopes due to Netatmo's commercials and claims :)
Nevertheless, fw87 and a "high-end" SD card made Presence ok for me. I can live with this.
On a scale 1-100 with current fw I would say 30 (percent) better than out of the box :?

I also really hope future fw updates will bring us better video quality. And after the hardware disclosure I find it absolutely doable if Netatmo choose to do so.

Re: Change SD Card

Posted: 15 Feb 2017, 17:30
by pmoore31
Quick update. I cant get my camera repaired, its a dead duck. To make thing worse, my other camera gave me the same error message today.

Defective SD Card, monitoring suspended!!

£500 on cameras, this is a joke as it takes netatmo 2 weeks to reply to emails.

Re: Change SD Card

Posted: 15 Feb 2017, 20:13
by Slim
Look at the bright side....you now have spareparts for the second one :lol:

Just kidding.... :)

Sorry to hear that your second camera also failed. Anyway....you have now learned your "250£ lesson" and air-dry the sd card slot only! ;)
It's so obvious that the Presence's major weakness is the design fault/placement of the sd card slot. There is no protection at all from dust, dirt or water.

Seal your sd card slot with 3M electrician tape, silicone for example.

"After our defeat, we will rise again stronger." <---- adage by the presence owner :D