As described in [[MISC-TN-024: Automated test equipment (ATE) monitoring with SBCSPG gateway and ThingsBoard IoT platform|''MISC-TN-024'']], the PLC we want to talk to is connected to a different subnet, namely 192.168.30.0/24. For testing the connection to the PLC, after adding the required subnet configuration, the <code>modbus</code> command line tool was used, which is provided by the <code>modbus_cli</code> package. In the following example, the register mapped ad the address 300 is read.

Similarly to what we did in [[MISC-TN-024: Automated test equipment (ATE) monitoring with SBCSPG gateway and ThingsBoard IoT platform|''MISC-TN-024'']], we created a simple dashboard to visualize collected data on cloud side in real-time as shown in the following example.