Teltonika FMB125 Getting Started page 11

Figure 29. MQTT test client
Incoming data is received in JSON format, for e.g.:
Figure 30. Received data format
To send SMS/GPRS commands to the device subscribe to a topic name - *DeviceIMEI*/commands,
and, in the same MQTT test client window select Publish to a topic. Enter topic name -
*DeviceIMEI*/commands. In the Message payload enter wanted GPRS/SMS command in following
format and press Publish:
{"CMD": "<Command>"}