Tunnel – Periodical sending of vehicle’s GPS locations and the registers of Modbus RTU temperature sensor RS485 to a Web server. Occasional 3G-5RS232 gateway for PLC’s firmware actualization

Scenario details:

• We have a truck whose GPS location and temperature of the 3 temperature sensors should be monitored. The truck is also equipped with a control PLC with RS232 serial port.There should be the possibility to update the PLC’s firmware remotely by the above mentioned serial port at any moment
• The modem must collect GPS location every 1 minute and send it in JSON format to a Web server throught HTTP POST
• The modem must read the temperature from the RS485sensors every 10 minutes and send it to a Web server throught HTTP POST
• The modem should be ready for updating the control PLC at any moment, therefore a 3GRS232 gateway must be activated in TCP 20010 port
• The modem should be able to be configured remotely via SMS and Telnet

Solution: MTX-Tunnel firmware + MTX-Java-IoT/MTX-Java-T/MTX-Java-T2

EXAMPLE of settings (file config.txt) for such scenario:

Details:

• The format of JSON object that MTX-Tunnel will send to a Web server, for sensor 1 (23.0º) is similar to the following structure:

{“IMEI”:353234028103206,”P”:”ID00001”,”TYPE”:”MODB”,”A”:1,”TS”:”20/04/13 08:31:44”,”ST”:1, “V1”:230}

• For sensor 2 (24.5º)

{“IMEI”:353234028103206,”P”:”ID00001”,”TYPE”:”MODB”,”A”:2,”TS”:”20/04/13 08:31:44”,”ST”:1, “V1”:245}

• For sensor 3 (22.1º)

{“IMEI”:353234028103206,”P”:”ID00001”,”TYPE”:”MODB”,”A”:2,”TS”:”20/04/13 08:31:44”,”ST”:1, “V1”:221}

• And for GPS frames:

{“IMEI”:357044060013890,”TYPE”:”GPS”,”P”:”ID00001”,”DATE”:”2016/10/30”, “TIME”:”21:35:51”,”LAT”:”41.629803”,”NS”:”N”,”LON”:”2.3609767”,”EW”:”E”, ”ALT”:”197.61”,”SPE”:”2.98”,”COU”:”9.85”,”STA”:”3”,”HPO”:”1.25”,”VDO”:”0.75”, “SAT”:”05”}

Where:

• Remeber that the modem model used in this example has 2 serial ports: the main port (RS232) and the secondary port (RS232 and RS485). To configure the secondary port as RS485 you should set microswitch 2 in “ON”, as it is shown in Annex A of this manual