In this article an experimental system of sensor network for monitoring physical variables applied to green technology in conjunction with internet of things (IoT) is presented. This, in a controlled ambient, that can guarantee the development and growth of the plants (exemplary/specimen). This application is focused on agriculture. Using Wireless Sensor Network (WSN) has a promising future due to current technical advances and its almost unlimited applications. This work propose WSN topologies, the measurement methodology, the sensors distribution and the visualization of the registered data in function of the area monitored, the communication protocol established by  Wi-Fi and the reads of the environmental temperature (ET), environmental humidity (EH) and ground humidity (GH) are registered and displayed in the web, during the registry of this measurements the data is analyzed and processed to perform relevant actions oriented to the control of physical variables at the monitored environmental area. Monitoring of the physical environmental conditions is registered every hour in a period of 24 hours. It is proposed to apply the system to green technologies together with internet of the things.