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标题: Understanding the DHT11 Sensor Relay Module: Applications and Functionality The DHT11 Sensor Relay Module is an essential component in many DIY electronics and home automation projects, offering a simple yet effective way to monitor environmental conditions and control connected devices. Combining the DHT11 temperature and humidity sensor with a relay module, this integrated system provides a practical solution for automatic device control based on environmental changes. At the core of the module is the DHT11 sensor, a low-cost digital sensor designed to measure temperature and humidity. The DHT11 operates within a temperature range of 0 to 50°C and can measure relative humidity between 20% and 90% with an accuracy of ±5%. Although it is not as precise as more expensive sensors, its affordability and ease of use make it ideal for beginner and intermediate electronics projects. The sensor communicates with microcontrollers such as Arduino or ESP32 using a single-wire digital interface, simplifying data collection and integration.