ABSTRACT

TEMPERATURE AND HUMIDITY CONTROL SYSTEM

USING GRAPHIC LCD AND ARM CONTROLLER

In the textile mills, a particular range of temperature and humidity have to

be maintained for effective storage and production purposes. In this project, we

have interfaced temperature and humidity sensors to the powerful ARM

microcontroller to sense atmospheric temperature and humidity.

The sensed temperature and humidity values are displayed on the Graphic

LCD. In the normal conditions, the relay is turned on, indicating that the values

are in the required range. When the upper threshold level is crossed, a red LED

is turned ON and when lower threshold level is crossed, a green LED is turned

ON. The interfaced relay turns on the controlling devices like dehumidifiers etc

when the red LED is ON. Hence monitoring of the room temperature and

humidity is accomplished by maintaining a database. The database consists of

temperature and humidity values at regular intervals of time.

A menu is created in the Graphic LCD. Further submenus are created

which consist of provisions for setting the lower and upper threshold limits.

Pixel font and Fast LCD softwares are used to create the LOGOS. Program

compilation is done using the KEIL software .This program is loaded to the

ARM microcontroller using the Philips utility software.