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mAP Lite Ethernet susceptible to interference!

Posted: Fri Feb 05, 2016 12:43 am
by nkourtzis
Today I had the following experience with my new mAP lite: I used the integrated magnet to stick it onto a metallic TP-Link 8-port gigabit soho switch. It took me about an hour to debug what I was seeing, but at last I figured that when the surfaces of the two devices were in contact, the ethernet port would connect at 10Mbps full duplex after a long negotiation process and no data would pass through! As soon as the mAP was detached from the switch, everything worked just fine. The exact place on the surface of the switch on which the mAP attached did not seem to make any significant difference.

Obviously there was some kind of interference that impaired the ethernet controller.

I suppose minuscule size comes at a price, but could there be a second revision with some kind of shielding around the board?

PS: The offending switch: http://www.tp-link.com/lk/products/deta ... SG108.html

Re: mAP Lite Ethernet susceptible to interference!

Posted: Fri Feb 05, 2016 12:50 am
by ZeroByte
have you tried putting some insulator between the map lite and the switch? It could be some kind of grounding issue that's leading to it.
Then I would try touching the MAP lite to the switch, but backwards so the magnet wasn't sticking.

Basically - if it interferes just based on proximity (with insulator, but sticking with magnet, or touching but backwards so no magnet) then try it in proximity to other ethernet devices, monitors, tv sets, electric appliances, etc.

Since I'm assuming it's plugged into the same switch that you're sticking it to with the magnet, I wonder if a grounding loop is interfering with the signal propagation along the cat5. Have you tried other cables?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Fri Feb 05, 2016 1:01 am
by nkourtzis
Unfortunately I cannot do further tests right now, since it is a production environment (and my only mAPL so far). But I will put them in my to-do list. Thing is, the outside of the mAPL is plastic, except from the ethernet post shield which is exposed and was almost certainly touching the switch case. The cable was not shielded though, just an ordinary cat5e patch with plastic plugs. I should probably try to put just a sheet of paper/plastic between them.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Fri Feb 05, 2016 3:32 am
by kiler129
Some ethernet poor quality RJ45 sockets MAY be affected by magnets and EMI. Since it's TP-Link I'm not really surprised ;)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Sun Feb 07, 2016 6:12 pm
by bazzer
I too have discovered issues with the magnets within the mAP lite. I find if the device is stuck in place with the magnet or the small backing plate that comes with it is placed on the back, the ethernet port will fail and sync to 10mbit with no data passed through it. If you boot the lite without it attached to a metal surface, the etherport works fine

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 8:05 pm
by Cha0s
I confirm the issue.

I have 3 mAP Lite and all 3 exhibit the same behavior as mentioned.

The surface does not seem to matter.

I've 'stuck' it over a switch, on a server, on a UPS, on the rack itself and the result is the same. No data passes through the ethernet.
The moment I remove it from any metallic surface the ethernet works like a charm.

I wonder if we can request a refund from the distributors since this is obviously a design flaw and the device does not work as advertised (at least in my country you are entitled by law for a replacement or full refund in case the product does not work as advertised).

I'll contact my distributor about returning these.

To add to the design flaw, when data passes through wifi, it will make a high pitch sound which is rather annoying when using the device in a silent room.
http://forum.mikrotik.com/viewtopic.php ... 04#p519204

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 8:24 pm
by ZeroByte
Does this happen if there's an insulator between the magnet and the surface it's stuck to?
(like if you had a strip of electrical tape on the metal, and stuck the magnet to that tape only)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 8:53 pm
by doneware
try to put it onto a non-metallic surface.

tmbk they tested it thoroughly, but the magnetic field generated by the magnets that hold the device onto something is influenced and deformed by the attached metallic surface itself. this causes interference in the wireless part for sure, and i guess this interference can also influence the ethernet side transformers too.

mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 10:37 pm
by darkprocess
Same issue here. Bad design ? What can be the solution, remove the magnets?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 10:40 pm
by chechito
i think ehernet is vulnerable to interference by itself, you have to guarantee good cabling and avoid any source of interference to be safe

of course i think a strong magnet so close to a electronic device is a bad idea

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Mar 02, 2016 10:44 pm
by Sob
Does this happen if there's an insulator between the magnet and the surface it's stuck to?
Magnets are inside, so no matter what you stick it on, there's always mAP's plastic body between magnets and surface. Not even ethernet connector can touch it, because it's covered from back side.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Thu Mar 03, 2016 12:20 am
by doneware
Same issue here. Bad design ? What can be the solution, remove the magnets?
must be ok as long you do NOT attach it to anything metallic (ferromagnetic)

mAP Lite Ethernet susceptible to interference!

Posted: Sun Mar 06, 2016 2:34 pm
by darkprocess
Can someone from mikrotik provide an answer to this issue

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Mar 15, 2016 2:21 pm
by ALDISBEHMANIS
Same problem here.
Even tried changing unit.
Design flaw!

mAP Lite Ethernet susceptible to interference!

Posted: Tue Mar 15, 2016 7:48 pm
by darkprocess
Mikrotik could you please provide an answer. Maplite is a great product anyway

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Mar 15, 2016 10:56 pm
by bazzer
Remove internal magnets and stick flexi sticky backed magnet to outside of mAP lite (also works for fat mAP)
Image
Image

Re: mAP Lite Ethernet susceptible to interference!

Posted: Thu Mar 17, 2016 11:17 am
by 3bs
And again, no comments from mikrotik :)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Thu Mar 17, 2016 11:27 am
by normis
If you find any hardware related issue with our products, please contact the seller to arrange a replacement via Warranty repair services.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Sun Mar 20, 2016 4:56 am
by 3bs
If you find any hardware related issue with our products, please contact the seller to arrange a replacement via Warranty repair services.
Noise when wifi work - hardware issue, or feature (all work fine except small noise)?
And ethernet that stop work after attach to mettal surface.
Maybe it's all hardware features? :)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Sun Mar 20, 2016 6:04 am
by Sob
Noise when wifi work - hardware issue, or feature (all work fine except small noise)?
It's MWAAF, MikroTik Wireless Activity Audio Feedback™. Patent pending. And for no extra charge!

Re: mAP Lite Ethernet susceptible to interference!

Posted: Sun Mar 20, 2016 8:54 pm
by DmitryAVET
If you find any hardware related issue with our products, please contact the seller to arrange a replacement via Warranty repair services.
Noise when wifi work - hardware issue, or feature (all work fine except small noise)?
And ethernet that stop work after attach to mettal surface.
Maybe it's all hardware features? :)
+1
Confirm noise on high load

Maybe power system?
mikrotik_rbmapl_2nd_map_lite_review_11_hardware.JPG

Re: mAP Lite Ethernet susceptible to interference!

Posted: Sun Mar 20, 2016 10:20 pm
by kiler129
It could be piezeoelectric effect of capacitors.

Details: https://www.youtube.com/watch?v=F2gX-R1k7MM

Re: mAP Lite Ethernet susceptible to interference!

Posted: Mon Apr 18, 2016 7:45 pm
by fragtion
I've got the same problem with my mAP Lite. I noticed a problem with ethernet connectivity immediately after unboxing on first use, but didn't realize that it was caused by a design flaw with the magnet until reading this thread

Update: Mine's working perfectly since removing the magnets.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed May 11, 2016 11:56 am
by juanvi
Broken Eth in one of my 3 map lite. Interface shows intermitent disconnections of few seconds. Faulty device? Magnets?Anyone else? Some news from MT side? I love this device, please MT give him some love too. :D

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed May 11, 2016 4:48 pm
by SolarW
Can confirm this issue - my 3 mAP Light have this problem.

1. Install to magnetic surface
2. Reboot or power cycle
3. Ethernet port not work

Temporarily solution (tnx to this post writers)

Solution 1 (without warranty void)
- install on NOT magnetic surface (on double-sided adhesive tape for example)

Solution 2 (with warranty lost)
- remove magnets from mAP Light cover

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed May 11, 2016 4:49 pm
by SolarW
If you find any hardware related issue with our products, please contact the seller to arrange a replacement via Warranty repair services.
Realy?
You have solution for this problem?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed May 11, 2016 4:59 pm
by normis
Well yes, we are able to fix most problems, I wrote about this in March already, so you would have received the repaired unit by now. Our RMA department needs to see your unit before we can make a definite conclusion what exactly was wrong.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed May 11, 2016 5:07 pm
by SolarW
Well yes, we are able to fix most problems, I wrote about this in March already, so you would have received the repaired unit by now. Our RMA department needs to see your unit before we can make a definite conclusion what exactly was wrong.
Sounds like good :)
I'm buy my mAP Light only two week ago - in March you write not for me :)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue May 24, 2016 6:29 am
by littlebill
Well yes, we are able to fix most problems, I wrote about this in March already, so you would have received the repaired unit by now. Our RMA department needs to see your unit before we can make a definite conclusion what exactly was wrong.

so what is the link to the fix? apparently everyone has this problem

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue May 24, 2016 8:24 am
by normis
Well yes, we are able to fix most problems, I wrote about this in March already, so you would have received the repaired unit by now. Our RMA department needs to see your unit before we can make a definite conclusion what exactly was wrong.

so what is the link to the fix? apparently everyone has this problem
Like I said, with any device that has any kind of problem, submit it to RMA for repair, so we can fix it.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue May 24, 2016 3:59 pm
by littlebill
ok let me ask this a different way, is there anyone on this thread or who owns one, who DOESN"T have this problem?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue May 24, 2016 4:16 pm
by normis
Not sure about this thread, but just let me remind you, that nobody goes into the forum for posting something that works. People come to the forum to post about their problems. This thread has 31 posts.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue May 24, 2016 6:47 pm
by Sob
To help fellow user with interrogation ;), are you saying that these troubled mAP Lites are only few bad units? The ones you have available for yourself to play with work fine, there's no trouble with ethernet speed negotiation even if you stick them on big metal rack using the magnet, and no noticeable noice even when you push 100Mbit through wireless. And if people go and buy new one, they have >99% chance to get trouble free unit? Is that so? Out of curiosity, any hints what's wrong with those units that don't work fine?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Thu May 26, 2016 7:08 am
by Zorro
cable itself is more EMI-vulnerable(or become part of pollution itself, which is even more important, sadly :/) than connector.
but if you deploy STP or CAT7 cable(or one of those "improved 6a" cables with one-two-multiple screens(but weaker than on Cat7 somewhat and with weaker cable itself and skin effect/bandwidth)) you HAD TO ENSURE that also connectors are - Properly Shielded and grounded, connected to screen, not just routers and for thus - have sockets with screen/grounding 360'/around clock.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Thu May 26, 2016 11:00 am
by sup5
One thing looks suspicious.
Since approx. two to three weeks no online shop I could find has MAPlite on stock.
But I remember they were available before this timeframe.

So I assume they all sent back their MAPs to Mikrotik for inspection.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Fri Jul 08, 2016 11:49 am
by Mazutti
One thing looks suspicious.
Since approx. two to three weeks no online shop I could find has MAPlite on stock.
But I remember they were available before this timeframe.

So I assume they all sent back their MAPs to Mikrotik for inspection.
Sounds possible, since mAP Lite have never been available here in Brazil, and no distributor has any forecast as to when it will be. Hope it´s for the best.

Mazutti

Re: mAP Lite Ethernet susceptible to interference!

Posted: Mon Jul 11, 2016 5:55 pm
by solelunauno
I noticed the same problem using mAP lite with its iron plate with adhesive: mAP will stuck @ 10Mbps and it will not work. If it's installed far from iron surfaces, it works well.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Mon Jul 11, 2016 6:52 pm
by darkprocess
I removed one magnet and now it works as it has to be.

Envoyé de mon SM-G925F en utilisant Tapatalk

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Apr 24, 2018 5:01 pm
by ecylcje
Hi,

Is this magnetic interference issue still happening with mAP Lites. I bought my mAP lite 17/04/2018 and it has issues where the eth1 port goes down every so often (seemingly random).

I have removed the 'metal backing' plate for now and attached using 'blue tack', but I was just wondering whether I should still need to be doing this, or even considering opening up the mAP lite to removal the internal magnet. (Is opening it up easy to do - I know it breaks the warranty).

Thanks,

Chris

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Apr 24, 2018 7:37 pm
by ecylcje
Update:

It has been running now for several hours without being attached to anything metallic, only via blue tack. The connection has been rock sold, whereas previously it was 'link' bouncing at least 2 to 3 times ever hour (or more).

I suspect either the issue is back or my MAP lite came from a supplier which had 2 year old stock (unlikely).

Thanks,

Chris

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Apr 24, 2018 8:06 pm
by bazzer
Pop the lid and see if it has any metal shield plates over the magnets. if it hasn't, its an original MK 1 with the ether interference problem. I'll see if i can find a comparison picture i took when the MK2 came out to help.

Re: mAP Lite Ethernet susceptible to interference!

Posted: Tue Apr 24, 2018 9:22 pm
by bazzer
MK1 on the left (bottom), MK 2 on the right (top)

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Apr 25, 2018 7:07 pm
by ecylcje
Hi,

Just as a reply to this. I contacted the seller and the stock is a maximum of 3 months old. So it should definitely be a MK2 version. I guess there are still issues.

I'm now just deciding whether to open it up and void the warranty or live with the 'blue-tack'. I suspect the blue-tack will win.

Note: There have been no issues since using the blue-tack.

Thanks to everyone,

Chris

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Apr 25, 2018 8:02 pm
by juliokato
Again mikrotik adjusts the product without at least providing some indication visible in part number or serial number. (like RevA or RevB)
We have to open the equipment to do a visual inspection of the product. (sad thing)
How much it costs to make a change on the labels?

Re: mAP Lite Ethernet susceptible to interference!

Posted: Wed Apr 25, 2018 9:41 pm
by bazzer
I'm now just deciding whether to open it up and void the warranty or live with the 'blue-tack'.
If I recall I don't think there are any warranty labels by MT, unless your supplier sticks anything on