Perfect. Also nice to hear that my guide is helpful for other people.
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As requested by @Jeff-UK , I have published the main guidelines for using the nfuse concentrator with a Pi Zero W and I hope it can help those who approach the project. Obviously the steps related to the command line vary according to the OS used with your SBC. Most of the problems have occurred because of a poor power supply. Please have a look here
where ? 
In the linked article 
(unfortunately the time available is not enough to list the individual steps on Raspbian but I hope to write a more detailed guide soon), the guide of @fewi is more than good. We could not understand why it was not good at the beginning, but I can assure that most of the malfunctions are due to poor power supply (concentrator that is not recognized or stops working). Energy saving and a good power supply are the key points. It may seem silly but it isn’t.
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Thanks for the update & pointers. In the comments to the OPi build article you mention additional steps/issues/problems wrt RPi0W build vs OPi - its heads up on these delta’s that would be very useful to stop others having to rediscover/resolve if you can post please. Good job…wallet opening ready for next build parts BOM buy 
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Nice build using the n-fuse concentrator card https://thomasflummer.com/projects/lora-gateway/
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It might be obvious, but does the Pico Gateway support downlink messages and/or ADR?
Or just supports uplinks?
Yes of course. It does not lack any feature the “normal” design has. In fact it has advantages in terms of stability as the time sensitive stuff is done by an MCU.
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Thanks!
There is a new feature that we have now successfully validated and tested with the n-fuse LRWCCx-MPCIE-XXX LoRaWAN concentrator card that I would like to mention here:
There is a firmware for the on board MCU available that allows to talk to the card using a UART instead of USB. It’s not mini PCIe compatible but might still be useful for custom designs.
The nice thing about this:
- Only the MCU needs to be re-flashed, you can use the same hardware. The firmware is available from here.
- No USB required but still improved stability as the MCU is taking care of time sensitive tasks
- The forwarder and HAL driver to not require any change.
We have updated the data sheet of our device accordingly.
I got this card yesterday and already have my gateway running. Really fast delivery and the parts look great.
BUT, I have to mention the provided pigtail from n-fuse doesn’t physically fit into the case, it is just too sturdy and will disconnect the plug if you bend it too much, the provided pigtails of the case unfortunately have the wrong gender on the sma side for the antenna.
Obviously it fits all together theoretically, but nobody was bothered enough to fit it physically together
It is in fact complaining on high level, since the price is really good, and given it worked right “out of the box” I would recommend this gateway.
@lindworm thank you for the positive review here.
The pigtail that we send with the kit fits and the gender must also be correct as you can see in the in the pictures in my post above. In case you should have received different parts, just contact the customer service and send over some pictures.
There is now a complete Gateway available based on the n-fuse LoRaWAN Cencentrator Mini PCIe card called lrwgwX-rpi-XXX based on the Raspberry PI 3B+ with Power over Ethernet Support:
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Hi fewi, it seemed a bit outdated but do you know what is the heat dissipation of this card? I mean will I be needing of heat-sink if I use this card in warm environment ?
Regards
Hi, it’s not needed when your environment temperature is not greater than what’s given in the data sheet for the respective model: https://www.n-fuse.co/products/lrwccx/lrwccx-mpcie-datasheet.pdf
Thanks fewi
@Vanthome thank you for the answer, I hope not to test this device in such an environment 
from -40 till +70 C … BTW, would you tell us what is major producer of heating inside the card, sx1301/1308 or other parts?
Hi @Vanthome is this mPCI compliant ? I mean, can I plug it into any device that supports mPCI and start working? I see that it is also using the PicoGW from 2017, is it something outdated that will go away some time soon?
Thanks.