Help identifying protocol

Hi guys,

I'm new to Traccar and Trackers and maybe you could give me a hand.

I bought this tracker on eBay
http://www.ebay.co.uk/itm/162074970967?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

the model is GT002

started by setting up the server and firewall to open the ports 8082 and 5055.
set up the client app on the phone and it's ok.
add another device on the server with the IMEI of the device and setup the device with the text messages provided in the (crappy) manual. One of the configurations is the server and port which I set to 5055.

and this is what I'm getting in the log:

2016-10-28 20:51:37  INFO: [A965AE23] connected
2016-10-28 20:51:37 DEBUG: [A965AE23: 5055 < 82.132.245.115] HEX: 78780d0103535062100353670004c9650d0a
2016-10-28 20:51:37  WARN: [A965AE23] error - empty text - IllegalArgumentException (...)
2016-10-28 20:51:37  INFO: [A965AE23] disconnected
2016-10-28 20:54:21  INFO: [29853C3D] connected
2016-10-28 20:54:21 DEBUG: [29853C3D: 5055 < 82.132.246.239] HEX: 78780d0103535062100353670006ea770d0a
2016-10-28 20:54:21  WARN: [29853C3D] error - empty text - IllegalArgumentException (...)
2016-10-28 20:54:21  INFO: [29853C3D] disconnected
2016-10-28 20:57:24  INFO: [19AC9FB1] connected
2016-10-28 20:57:24 DEBUG: [19AC9FB1: 5055 < 82.132.212.82] HEX: 78780d0103535062100353670007fbfe0d0a
2016-10-28 20:57:24  WARN: [19AC9FB1] error - empty text - IllegalArgumentException (...)
2016-10-28 20:57:24  INFO: [19AC9FB1] disconnected
2016-10-28 21:00:20  INFO: [2F2F0AFB] connected
2016-10-28 21:00:20 DEBUG: [2F2F0AFB: 5055 < 82.132.237.7] HEX: 78780d010353506210035367000803090d0a
2016-10-28 21:00:20  WARN: [2F2F0AFB] error - empty text - IllegalArgumentException (...)
2016-10-28 21:00:20  INFO: [2F2F0AFB] disconnected
2016-10-28 21:03:21  INFO: [1A318FFA] connected
2016-10-28 21:03:21 DEBUG: [1A318FFA: 5055 < 82.132.225.114] HEX: 78780d010353506210035367000912800d0a
2016-10-28 21:03:21  WARN: [1A318FFA] error - empty text - IllegalArgumentException (...)
2016-10-28 21:03:21  INFO: [1A318FFA] disconnected
2016-10-28 21:06:22  INFO: [C1168DDA] connected
2016-10-28 21:06:22 DEBUG: [C1168DDA: 5055 < 82.132.239.220] HEX: 78780d010353506210035367000a201b0d0a
2016-10-28 21:06:22  WARN: [C1168DDA] error - empty text - IllegalArgumentException (...)
2016-10-28 21:06:22  INFO: [C1168DDA] disconnected
2016-10-28 21:06:22  WARN: [C1168DDA] error - empty text - IllegalArgumentException (... < MainEventHandler:102 < *:91 < ... < ExtendedObjectDecoder:52 < ... < ReverseGeocoderHandler:48 < ...)
2016-10-28 21:09:23  INFO: [8212E262] connected
2016-10-28 21:09:23 DEBUG: [8212E262: 5055 < 82.132.236.53] HEX: 78780d010353506210035367000b31920d0a
2016-10-28 21:09:23  WARN: [8212E262] error - empty text - IllegalArgumentException (...)
2016-10-28 21:09:23  INFO: [8212E262] disconnected
2016-10-28 21:12:22  INFO: [9305B6D7] connected
2016-10-28 21:12:22 DEBUG: [9305B6D7: 5055 < 82.132.186.186] HEX: 78780d010353506210035367000c452d0d0a
2016-10-28 21:12:22  WARN: [9305B6D7] error - empty text - IllegalArgumentException (...)
2016-10-28 21:12:22  INFO: [9305B6D7] disconnected

the message is changing so I suppose it's working but does anyone recognize the protocol?

also, I noticed the IP address is constantly changing. Is this your experience with trackers?

Thanks in advance guys...

Carlos

It's GT06 protocol, port 5023 in Traccar.

IP address changes because device re-connects to mobile network every time and get new IP address from network. That's common.

Thanks a bunch Anton :)
It's working now :)

Do you know if there is a simple open source protocol I can use to build my own tracker?

Carlos

You can use one of these:

https://www.traccar.org/osmand/
https://www.traccar.org/traccar-client-protocol/

I have a SIM808 with arduino with the SSCOM32 command commands AT the SIM I use this protocol .. I want to help me find how to send the data correctly ,,, thanks

If you want to send in OsmAnd protocol, it has to be a standard HTTP request:

https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol