AVL data packet receive failure on TCP connection with FMC125

We followed the exact same procedures of Codec 8 protocol as documented in Teltonika page , And successfully got to make clear tcp connection with the Device.

Yet, few things are yet to know and yet to be resolved,

  1. Over successful receive of IMEI number in first step, Server attempts to send an one byte code as confirmation. Now, though we are supplying that (b’\x01’ in Python), No reciprocate is coming from device’s end. What could be the reason for this?
  2. It was well versed somewhere that FMC 125 runs over CODEC 14 protocol, yet it’s pretty much following the CODEC 8 methods. Clarification is required .

Hi Majinma,

Good day,

  • Codec 8 or codec 8 extended is used for data sending
  • codec 12/13/14 is used for communication over GPRS.

Reference: Codec - Wiki Knowledge Base | Teltonika GPS (teltonika-gps.com)

If you need to go into deep for this case please create an HD ticket or contact your sales manager.
If you don’t have any contacts with our Sales managers, please contact them on our official website https://teltonika-gps.com/ and click on the “Contact Us” button. When you click, please fill out the form and submit it. Note: as a topic, please choose “Vehicle telematics”. Or you can send an e-mail with a description of your situation to info@teltonika.lt

Best Regards
Maynard C

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