Issue 1 - Join issue: So I would say your gateway does not receive Join Accept and forward to the LSN50v2.
=> You may upgrade ChirpStack to 4.8.1 or above.
=> And upgrade the firmware of your gateway.
Issue 2 - Bad signal: My signal is not so good for EU868.
It is fine for me as my LSN50v2 is tuned for AS923 (920-923Mhz).
The bad signal may be wrong attenna for LSN50v2 selling at your country.
=> Double check the label EU868 on the box of LSN50v2
=> Buy another antenna for LSN50v2 to fit EU868.
@datnus Thank you so much for your time and efforts! I will study your data precisely and maybe find the solution. All of my devices are marked as EU868 so bad region shouldn’t be the cause.
May I ask you what was the approximate distance between your nodes and gateway?
@IoTThinks Don’t remember the exact name now but it was a local distributor in Poland. Devices were not shipped from abroad. Nodes have 868 printed on the boxes and their boards, they also report this frequency band when connected to my computer. So I really hope that’s not fake
Within 1 meter only.
Later I flash back to AS923 and give you the RSSI/SNR.
I believe there are two issues in your case.
The node is not fake. However, you may try the node with other antenna.
Dragino LSN50v2 uses RP-SMA connector.
This is more important: Your gateway does not send back the Join Accept.
You may configure to use UDP Packet forwarder in your gateway.
And you may upgrade the firmware of your gateway.
Thanks, I already know those. I created some piece of PHP code that subscribes gateway events and captures them. The only missing piece to go further is repeatable successful join So I will try to investigate there after successful firmware upgrade.
node sends joinreqest, received by gw (rx works), sent to cs
cs answers: join accept: cs works
communication stops here: it seems that nodes don’t receive anything from gw!
Mikrotik LtAP LR8 LTE kit does not have any internal Lora Antennas (it has 2 LTE-antennas!)! an open antenna connection is a high-frquency short-circuit, which means the whole emitted energy from tx is reflected at this point back into the transmitter, which could have destroyed it (hopefully the module does have protection for this).
what you can do:
you can take an antenna from one of your nodes (switch it off!) but check if it is an SMA connector (not RP-SMA)
read logs of the gw
if not successful, replace Lora-module in Gateway
(the rx in the gw may work without ant because the devices are not shielded 100%, so you may receive frames from nodes in close proximity
