<![CDATA[The growth of oyster mushrooms (Pleurotus ostreatus) is highly influenced by appropriate temperature and humidity conditions. However, the environmental conditions at the research site frequently exceeded the ideal range, and monitoring was still conducted manually, requiring the farm owner to visit the cultivation house directly to determine its environmental conditions. This study aimed to design and implement a temperature and humidity monitoring system using a DHT22 sensor with LoRa communication and Node-RED visualization, as well as to analyze the system performance based on data transmission success and its capability to display monitoring data in real time. The research employed experimental and observational methods, including system design, implementation, testing, and performance evaluation during operation. The system consisted of a DHT22 sensor, an Ebyte E220-900T22D LoRa module for data communication, an ESP32 Microcontroller, and Node-RED as the visualization platform. The results showed that the system successfully transmitted data over a distance of up to ±100 meters with average measurement errors of 2.52% for temperature and 2.56% for humidity compared with the reference instrument. Furthermore, the system displayed temperature, humidity, and RSSI values in real time and consistently monitored the cultivation environment for seven consecutive days. These results indicate that the proposed system is reliable as an accurate, efficient, and real-time monitoring solution for oyster mushroom cultivation.]]>
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