High temperature and rainy summer weather is not conducive to producing high quality crops. Greenhouse environmental control to protect crops from bad weather to improve the efficiency of greenhouse production and the stability of crop yields and quality. Central control of greenhouse there is a sealed transparent plastic film or the cultivation room, on the growth of crops and the regulation of indoor temperature, humidity and illumination to provide an environment suitable for farming throughout the year.

Greenhouse with water, ventilation system, shading networks, such as greenhouse cooling transom opening and closing of facilities, in the summer months for crops to provide a cool environment, can also protect crops from storm damage; greenhouse can withstand winter cold and frost damage to crops. Central test system is currently used to detect various types of PLC devices and connections, managers need to monitor on the scene, it is a major problem.

This case, the scene of the greenhouse temperature, and degree of brightness and the PLC link detectors, MA8-6 through the RS-232 link with the PLC, use the graphical interface with the PLC to set up the exchange of information between the formats, through the GPRS and Internet-related data will be sent to the central control center. Central control center to monitor the host via RS-232 link with the MA8-1, when the return information value below or above the set threshold, the host will monitor the alarm information sent via SMS to the relevant management systems, managers can as soon as possible to minimize the response to temperature, humidity and light generated by environmental changes such as loss.