Design and implementation of the greenhouse temperature
and humidity detection system based on 51 single chip
microcomputer
Abstract: With the development of economy, great changes have taken place in the
agricultural industry in our country, one of the more prominent changes is the
greenhouse planting. In different seasons, the greenhouse planting has a great
production, more and more farmers use greenhouses to grow vegetables. Controlling
of temperature, humidity and illumination are the key factors of high production in
greenhouse. If we need to measure the temperature and illumination, it will need more
man-power and material resources for a large number of greenhouses. With the
development and expansion of agricultural industry, the traditional methods of
measuring the temperature and humidity will has many limitations and shortcomings.
Now, the automatic monitoring device of temperature and humidity is adopted by
more and more farmer in the shed.
In this paper, the temperature and humidity monitoring system of greenhouse
based on STC89C52RC MCU are designed, mainly including circuit design and
software design. The system uses the single-chip microcomputer as the core through
the digital temperature and humidity sensor DTH11 and light sensor BH1750 to
collect the temperature and humidity and light intensity of the greenhouse. The data
are collected by the sensor feed back to the MCU for the corresponding analysis and
processing according to the received data, the results are shown on the LCD1602
liquid crystal display monitor. If beyond the preset temperature, humidity and light
intensity limit, the microcontroller control open indicator lamp, while controlling the
corresponding relay drive to open the equipment work, so that the greenhouse
temperature and humidity values to the appropriate range of value.
Keywords:-STC89C52RC-MCU;Digital-Temperature-and-Humidity-Sensor-DTH11;
Llight Sensor BH1750 FVI;LCD1602 Liquid Crystal Display Monitor
