Queclink GV500GC device Protocol

Moto198718 days ago

Hi, I have purchased a queclink device and set it up with the software. The device also sends data to my server, but it can't do anything with it. From the log I can read the following HEX value:

102400044d51545404c00e1000065352363030360006535236303036000870617373776f7264

The HEX decoder from this page here cannot convert the code. I then had the code converted in an online decoder and the following text came out:

$�MQTTÀ�SR6006�SR6006�password

SR6006 is the name of the device, but I never set a password. Apparently I have to.

Is there a way I can get the device to run successfully on my server?

The port number is 5004, almost forgotten to mention.

Moto198718 days ago
INFO: [Tf43138d1: gl200 < 176.83.136.203] 102400044d51545404c00e1000065352363030360006535236303036000870617373776f7264
2025-07-29 08:25:22  WARN: [Tf43138d1] error - index: 0, length: 4 (expected: range(0, 1)) - IndexOutOfBoundsException (... < Gl200FrameDecoder:37 < Gl200ProtocolDecoder:51 < ExtendedObjectDecoder:73 < ... < WrapperContext:102 < ...)
2025-07-29 08:25:22  WARN: [Tf43138d1] error - index: 0, length: 4 (expected: range(0, 0)) - IndexOutOfBoundsException (... < Gl200FrameDecoder:37 < Gl200ProtocolDecoder:51 < ExtendedObjectDecoder:73 < ... < WrapperContext:102 < ...)
2025-07-29 08:25:22  INFO: [Tf43138d1] disconnected

This is the full info from the log file

Anton Tananaev18 days ago

Port 5004 is definitely not the right one for this format. It looks like some new MQTT-based protocol.

Moto198718 days ago

I will try later other settings.

I have seen that I can also select a TCP short connection option with the traccar.
I will report how it goes

Moto198717 days ago

Unfortunately, nothing has brought success. I have the following setting options. What do you mean? Will I be able to connect the device or should I buy another one?

https://we.tl/t-L7wGSGOp3w

Anton Tananaev17 days ago

The problem is MQTT formst and I still see on your screenshots.

Moto198717 days ago

What do you mean by that, that's what you see in my screenshots? Is everything configured incorrectly? I set the port to 5055 as a test, but after that, I stopped receiving messages. According to the log entry, messages are coming back on port 5004.

Anton Tananaev17 days ago

Have you checked your screenshots to see where it says MQTT? That is not a supported format, as I keep repeating.