protocol gl200: SACK?

Hello,

I am using a few Quecklink gt 301 devices that use the gl200 protocol.

I was wondering how I can enable the sending of SACK responses by the server.

I am asking the question because I would like the TCP connection to stay alive to have an "online" or "offline" status.

Any ideas?

Please provide documentation for SACK.

Hello Anton,

I am using the Track Air Interface protocol (2th generation), documentation is available here: https://www.dropbox.com/s/74kmtahjkp865jy/Documentation.zip?dl=0

File: GT301 @Track Air Interface Protocol 2nd generation_R1.00

On page 11 of the PDF (page 10) section 2, there is an explanation that the back-end server should respond to the heartbeat signal (or any signal for that matter) from the tracking device. Some more explanation is on the previous and next pages. Specially under the section "enable SACK"

When I take a little look at the Java code (I am not at all into Java, sorry) I think I can see something about SACK or ACK already existing, but I cannot see how it works and I do not see the messages in the debug log.

You need to set gl200.ack to true in the config file to enable it.

Thank you Anton, great product!

I will make a test later this day. I there a list of all protocol config options or a java file where I can see them? I looked into the protocol decode files etc but it's not to clear for me.

Regards,
Jan

Some are documented on the website, but mostly you just need to look at the code.

Any file in specific for the gl200 protocol? I'm not finding it easily myself.

Found it: Gl200TextProtocolDecoder.java line 772

Hello.

Where is that line? I didn't found the Gl200TextProtocolDecoder.java to activate the SACK feature.

Thanks.

Line 900 on master branch. Not sure why you couldn't find it.

Anton Can you help me out? got the same problem and im a bit noob in traccar...