Temperature and humidity monitor and control

Temperature and humidity are an environmental concern that is relevant to many industries, as air temperature increases, air can hold more water molecules, and its relative humidity decreases. When temperatures drop, relative humidity increases. High relative humidity of the air occurs when the air temperature approaches the dew point value. The importance of food safety has grown worldwide in recent years. The measurement of temperature by using suitable sensors and controllers is not only important in environmental or weather monitoring but also crucial for many industrial processes. A solution has been chosen for the project which is a wireless data transmission of temperature and humidity control system based is on the PIC16F877A microcontroller, CC1101 wireless transceiver module and DHT11 temperature and humidity sensor is designed. It has advantages such as: low cost, better applicability and lower interference. This system not only can receive data by device or a tablet, but also can connect to a computer with USB line and send signals to turn on fan or humidifier. The theory shows that the system is stable, power consumption is small, and can be used in various occasions where the temperature and humidity data is needed.