I used the Teltonika sample code to receive data from the Teltonika FMB920 GPS tracker. According to Teltonika documents (Codec 8 documentation), to receive data from the Teltonika GPS tracker on TCP protocol, the tracker sends his IMEI to the server, and then the server sends back one byte of 0x01 (Accept) or 0x00 (Reject) as a response. then the GPS tracker sends GPS data packets to the server and the server should send back the count of received packets as the response. if not the GPS tracker tries to send duplicate data packets again and again until the server sends the count of data as a response. The sample works in terms of receiving and accepting IMEI but always receives duplicate GPS data packets.
Hello @pouyanaderi
Good day, please try to visit our page to know more about protocol integration: Help with Server FAQ - Wiki Knowledge Base | Teltonika GPS
Best Regards
Maynard C