We have a Garmin device connected to an Teltonika FM4100. We can send and receive text messages via Fleet Management Controller Version 1.
What we need is a small java console program (and the source code, we need no gui) which
a) opens a port, where Teltonika sends data to
b) parse the received data (and output the sended gps data as an example)
c) receive and print text messages, which are entered on the Garmin
d) transmit a static text message (as an example) from the java program to the Garmin device
Thank you for your offers