Description: We use Atmel AVR ATmega8535 microcontroller and LM35 temperature sensor as the main components of the system. Liquid Crystal Display (LCD) and buzzer are used to display the server room temperature and as an alarm, respectively. In order to alert the server administrator, the system is equipped with a GSM modem to immediately send text message if the server room temperature is above a predefined threshold. A relay board is also connected to the microcontroller to control other electronic appliances inside the server room.
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