Design Based On Microcontroller For Remote Monitoring Temperature And Humidity Of Greenhouse

With the increasing of greenhouses and rapid development of greenhouses’technology, it has become an important problem today to control the parameters ofthe temperature and humidity in greenhouse research. As for traditional greenhouses,people generally use artificial methods roving and inquiry to sense the changes ofenvironmental factors through the greenhouse temperature and humidity meter in thegreenhouse, and later, with the development of sensor technology, microelectronicsand communications technology, people make up simulate sensors, transducers,microcontroller, multi-channel analog switches and other components monitoring tobe a whole system, however, this method requires a lot of wires and it is complex toinstall and remove of the system, and when the system has something wrong, it isdifficult to find the source of the problem, and the on-site sensor signal is transmittedto the capture card throughout a cable, so it cost a lot. Also, because the analogsignals are transmitted, the loss is serious, and the anti-interference ability is weak,along with the error will be larger and it will lead to low accuracy, it is not conduciveto the greenhouse for real-time monitoring, and it easily lead to wrong actions anddecisions for the staff. Therefore, it is necessary to develop a high-precision,real-time, anti-jamming capability system that the failures can be sent to staff in realtime.The system integrate microcontroller, sensors, communications and computertechnology, it adopts multi-point method technology, digital single-bus technologyand GSM wireless transmission technology to designe a real greenhouse monitoringsystem. The systematic core is microcontroller, first of all, intelligent digitaltemperature and humidity sensors to the scene of the physical signal acquisition up,and then transfer it to the microcontroller, preliminary processing and storage, canachieve real-time display of data, and then use the external keyboard can also modifyits settings, you can also achieve limit alarm. In addition, the microcontroller can also transfer the data to the host computer PC, PC to PC data transfer can be stored,modify, print, view, and other related operations. SCM is the core of the scene, italso bears the role of long-distance transmission through the communication moduleis connected, the fault alarm remote transmission. This design can also be easilyextended system function, multi-circuit monitoring, regular sampling, not only cansimply be displayed on the screen, you can also be sent through the serial port to thehost computer, and further archiving, facilitate staff view history data. The design ofthe monitoring system is simple structure, easy installation, flexible scalability, easymaintenance, anti-interference ability, and does not require any fixed networksupport. The system can be comprehensive, real-time, on-site environmentalautomatically monitoring, automated agriculture.