Hello everybody,
I’m new to LoRaWAN technology, trying to move ahead step by step.
I built a Gateway based on a Rpi3B+ with single channel packet forwarder firmware and a dragino HAT Lora module. I tried to follow the on-line tutorial to connect it to TTN server eu1.thethings.network , but without success. The gateway can’t connect. Thanks for help!
SCPF & DCPF’s are deprecated and have not been supported on TTN for many years. We use LoRaWAN which requires a full Gateway (min 8 channel + full SF suite). Please disconnect this from the network and do not attempt again…disruptive to other users and will be a challenge for you to use other than intermittently. Go get a full gateway (or replacement full LoRaWAN concentrator HAT/interface board) and try again then.
Ok, it is disconnected and has never been connected!!
Is RAK2247 LPWAN Gateway Concentrator Module suitable?
Yes, with a suitable mPCIe interposer board for the Pi 
Would recommend SPI vs USB version…the 5146 is another alternate (SX1303 based)
mPCIe interposer board? What is it?
Something like this
Note this is for the 2287 or the 5146 - not sure if ok with the 2247
Alternatively look at the RAK2245 RPi HAT
RAK2245 Pi HAT Edition | Fully Functional LoRa Gateway Concentrator Module – RAKwireless Store - a concentrator on a RPi 40pin connector directly.
Thanks a lot for the leads.
Last question; is the frequency 433 MHz still available for LoRa in Europe?
Yes, but not supported on TTN or most other networks…you need EU868; if in Europe…and of course your nodes to to match choice…