Temperature and Humidity Monitor using DHT11 and  NodeMCU

The Temperature and Humidity Monitor using DHT11 and NodeMCU is a simple yet effective IoT-based project designed to measure and display environmental conditions in real-time. This system uses the DHT11 sensor, which is capable of detecting both temperature (in °C) and relative humidity (in %) with reasonable accuracy for hobby and basic industrial applications.

The NodeMCU (ESP8266-based microcontroller) acts as the main processing and communication unit. It reads data from the DHT11 sensor at regular intervals and can display it locally on a serial monitor or upload it to a cloud platform such as ThingSpeak, Blynk, or Firebase for remote monitoring.

The project is useful in applications like home automation, weather stations, smart agriculture, and greenhouse monitoring. It helps in maintaining optimal environmental conditions by alerting users or triggering other systems based on preset thresholds.

Key advantages of using NodeMCU include its built-in Wi-Fi capability, low power consumption, and compatibility with the Arduino IDE. The DHT11 sensor is economical and easy to interface, requiring only a single digital pin for communication.

In this setup, the sensor readings are typically updated every few seconds. You can also integrate an OLED display or an LCD to show the temperature and humidity directly on the device.

Overall, this project is an excellent starting point for learning IoT (Internet of Things), sensor interfacing, and real-time data monitoring. It can be expanded further by adding more sensors or controlling actuators like fans or humidifiers based on environmental conditions.