Downlink is not working properly (OTAA very difficult)


Dear Mr. Brocaar,
We have been running a lora server for a while now, with no special problems, but something new is happening lately.

The OTAA Delay is 5s, I didn’t know it, I don’t enter into the deep details of the LoraWAN specification, but the fact is that most of the time (like 75%) our nodes are not able to join OTAA.
This is quite new, I don’t know if smothing has changed lately.

I want the server to answer before those 5 seconds. How can I configure it ? In the node panel, when the device profile is defined as OTAA? it is not possible to change the RX1 delay of the node.
In the server configuration file, the RX1 delay is already set to 1

class a rx1 delay


How can I reduce the time the server takes to answer to OTAA ?

Thanks a lot and cheers again for your extraordinary job !