Temperature and humidity have an important role in the cultivation of oyster mushrooms to obtain optimal growth of oyster mushrooms. The optimum temperature required ranges from 24 ° C - 27 ° C and 80% - 90% humidity. The watering of mushroom kumbung should be done regularly, in order to maintain the temperature and humidity of the surrounding air, then conducted research that aims to create a tool that can regulate the temperature and humidity kumbung mushrooms automatically to facilitate farmers keep the temperature and humidity stability continuously. This automatic adjustment system uses DHT-11 sensors as air and humidity and arduino uno gauges as tool controls. Tests conducted for 7 days with data collection in the morning at 06:00 AM, noon at 12:00 PM and afternoon at 4:00 PM. The test results prove that this system of temperature and humidity regulator can keep the stability of room temperature and humidity with an average 25°C of room temperature and 60% of humidity with set point temperature at 27°C and 55% of humidity.
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