ABSTRACT
Based on the design of a microcontroller and a digital 1wire-bus technology temperature measurement and control system used in the greenhouse design. Once the temperature exceeded our pre-determined, the minimum level, Single-chip microcomputer will activate alarm system for alarm as well as on the greenhouse temperature control. This design programmes to more real-time inspection of temperature, the unit can detect independent of their respective functions, according to the instructions of Controller temperature regularly collected, measured not only in the local, and can use the microcontroller serial port, through the RS-485 bus and communication protocols will be collecting the data transmission to the computer, further filing, processing. Zhu Kongji responsible for the control sent commands to control all from the collection of temperature, the measurement data collection and measurement results are finishing, display and storage. The monitoring system does not require any fixed network support, installation simple, stable and reliable system, maintainability well.
Keywords:DS18B20;Single-chip microcomputer;RS-485;1-Wire;