RM520N-GL RGMII Ethernet port issues/drops

DANG! that’s a huge heat sink!
Mine arrived last night. I can confirm that this one is SO MUCH more stable than the 2 different MCUZone boards I’ve tried. I am running my RM521F off of this board via the ethernet port. Things seem so much more stable and I haven’t had a single disconnect all night.

However - I have zero link lights on that PHY interface. Using the power barrel, the interface is up and working, though. fingers crossed! Also, POE requires 48v passive. My switches are only POE+ and POE++. I’ll need a converter.

Can you please share what kind of converter I need to buy to make it passive 24v?

if you are asking what converter you need to convert from 24V passive to 48V passive - I’m not 100% sure.
Here is a 48V passive POE adapter from Unifi that will most likely work. I am about to get one, myself. 48V DC PoE Adapter - Ubiquiti Store

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Thanks for the tip about the better M.2 board.

To those of you who had trouble with your MCUZone boards, did you try upgrading the stock antennae? I’ve seen a couple of separate posts/user reviews saying the stock antennae they ship are awful.

I am going to replace my antenna with TE Connectivity ANT-5GWWS6-SMA units (bought from Mouser) to see if they solve the randomly-dropped cell connection issue first. If not, then I’ll order the board that rework.network sells and use the new antennae for that box.

TE has other models in the same series that are lower gain. I’m getting the highest-gain ones they have in the series, which may be bad if they exceed the Quectel RM520N-GL’s design parameters.

Thanks for the link. I was saying 24V because this is what the seller has told me today on AliExpress. He told me I recommend you to buy a passive 24V POE.

Which micro USB to USB C convertor did you buy so you didn’t have to use the short cable the unit comes with.

https://a.co/d/eYNoLf4

Just noticed it uses that instead of Usbc, wonder why.
Looks like the same interface as my old Galaxy Note 3 cords, I have several of those still lying around.

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Thanks for the link to the new board, have one on the way :slight_smile:

Can confirm the MCU board for the 5g CNC case has the same issues as described. Frequent disconnects, almost guaranteed to happen when running the upload part of a speed test. Often have to power cycle twice to get back up and “running”.

I opted for Cradlepoint 600-6000 antennas over the supplied MCU ones. Night and day in terms of signal quality, but the board is too unstable to appreciate the difference.

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MCU boards are trash. my first M.2 to RJ45 had bad RJ45 port. which they refused to replaced. so I purchased another M.2 to RJ45 CNC barebone which worked but now it power cycle randomly ( power not stable?)
i wish i see this post before i purchase the “OG” M.2 to RJ45 board from Aliexpress. $55 Aliexpress vs $70 wirelesshavan is worth the $15 premium!!

edit: spelling

i’m using this adapter, maybe it could be better
5G M.2 TO Gi.gabit ETH - Waveshare Wiki

BUT i’m not using the ethernet port and power adapter (bundled).
I tested only once for curiosity, it worked so i went back to usb 3.1

@iamromulan noticed Wireless Haven include a small aluminium heat sink as part of the kit but there’s no mention where it goes. Looks to be around the same size as the Realtek chip?

the heatsink is under the modem. make sure to install thermal pad in between.

correction: sorry mis-read your question. that small heatsink should be for rtl8125 chipset.

Sorry I am very noob, can you please show me where the rtl8125 chipset located so I can install the little heatsink?

I see in the image you have the 551E X75 module installed. I read before that it only supports USB connection not pcie. Has things changed? Thanks!

Assuming this is what it’s meant for ?

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Correct. Wireless haven didn’t include that. Rework.network started to.

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Yes. As of the latest firmware from June PCIe RC is working.

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have you done any thermal comparison between OG vs wirelesshaven or rework unit?
i just got the OG unit last night and it runs hot with top cover off 62C.
i just ordered the rework and plan to add 30mm blower fan inside.

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With the aluminum heatsink+thermal pad underneath and a copper heatsink on top.

Wireless Haven just resells from rework.network

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