FMC125 and RS232 Serial hardware


I have a FMC125 gps connected to a serial hardware sending “Hello world” each 1 minute to serial port.

From GPS, the Tx pin is connected to Rx hardware pin and from GPS, the Rx pin is connected to Tx hardware pin.

The setting parameters are shown in the image attached.

Why I don’t see the data sent from the hardware to the GPS?

Thanks in advance



Good day, Delimieter is only for reading data if you want 2-way communication please check the TCP Ascii Mode.

Reference: FMB125 Testing RS-232 and RS-485 TCP link mode - Wiki Knowledge Base | Teltonika GPS (

Best Regards
Maynard C