The success of harvesting white oyster mushrooms depends on the treatment especially the conditions of temperature, humidity, and light intensity in the mushroom house, the placement of sensors must be precise so it can represent the conditions inside the white oyster mushroom and proper action can be taken. Determination of the location of the sensor point is done using the Finite Element Method approach by dividing the mushroom house into small segments to help analyze the parameters of temperature, humidity, and light intensity inside. The control system uses an ON-OFF hysteresis controller mode. Temperature and humidity sensors (DHT11) are positioned respectively on the left, center, and right side of the mushroom house. Data from DHT11 measurement is processed by NodeMcu V3 microcontroller and then will activate the actuator. The interface (GUI) for monitoring is designed to use Blynk application. The controlled parameters meet the needs of white oyster mushrooms, temperatures of 20-26°C with the error 2°C, humidity 80-90% with the error 5%, and lighting 200-640lux with the error 10 lux. The control signal can keep the range of parameters maintained.
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