This article presents the design of a wireless communication system, responding to the sensor concept applied to a scaled industrial process where temperature variables were used. The sensors are connected to the internet (IoT) to be monitored remotely from anywhere in the world. The sensor data is downloaded from the cloud using a graphical programming platform to control and communicate the system with a programmable logic controller (PLC), which performs the actions according to the temperature value (set point) of the sensors. The monitoring process was performed with a SCADA system and the modeling of the communication system was performed using the formalism of Petri nets, as a system that responds in terms of discrete events.