Gateway Invalid Protocol Version

Mert_Kaya · April 16, 2024, 9:05am

Hi,

I try to send data from my endpoint device to my chirpstack bridge server using helium. I can confirm that my bridge server can get the data but with an error. The error is:

time="2024-04-16T07:40:22.377677766Z" level=error msg="backend/semtechudp: could not handle packet" addr="ip-address" data_base64="yAIAOgAAAAAAAAAAgAgAAAAAAAEACAAAAAIBAIAKAAAAAwAAAAOADAAAAAdYcGFuc2WACAAAAAkAAQ==" error="gateway: invalid protocol version"

Is there someone who knows why I get the error and how to solve it

Thanks.

brocaar · May 2, 2024, 10:07am

Most likely the UDP data that you are receiving is not correct. You can find the specification here:

github.com

Lora-net/packet_forwarder/blob/master/PROTOCOL.TXT

	  ______                              _
	 / _____)             _              | |    
	( (____  _____ ____ _| |_ _____  ____| |__  
	 \____ \| ___ |    (_   _) ___ |/ ___)  _ \ 
	 _____) ) ____| | | || |_| ____( (___| | | |
	(______/|_____)_|_|_| \__)_____)\____)_| |_|
	  (C)2013 Semtech-Cycleo

Basic communication protocol between Lora gateway and server
=============================================================


1. Introduction
----------------

The protocol between the gateway and the server is purposefully very basic and 
for demonstration purpose only, or for use on private and reliable networks.

There is no authentication of the gateway or the server, and the acknowledges 
are only used for network quality assessment, not to correct UDP datagrams

This file has been truncated. show original