c9Rwi41

Temperature and humidity alarm

Overview

DHT11 is used to detect temperature and humidity values. Press Key1 to enter the adjustment mode. The keys (Key2, Key3) can set the upper and lower limits of temperature and humidity. The current temperature and humidity value measured by DHT11 is compared with the upper and lower limit values of temperature and humidity set by the system. If the current temperature and humidity value is higher than the upper limit value, the red light will turn on and the buzzer will sound. If the temperature and humidity are lower than the lower limit, the green light will turn on and the buzzer will sound. The LCD displays the upper and lower limits of temperature and humidity and the current temperature and humidity value measured by the DHT11 module.

Design Files

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Update:2025-06-18 22:48:55

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