This project is an IoT-based Air Quality Monitoring System that uses a NodeMCU ESP8266, DHT11 sensor, and MQ135 gas sensor to measure air quality ... NodeMCU ESP8266 - Microcontroller ... (Optional) - ...

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Circuit Diagram for Connecting ESP8266 to Arduino Cloud IoT. Circuit Diagram for sending DHT11 sensor data to the Arduino IoT cloud is given below. Connections are pretty simple. DHT11 sensor is ...

This proposed work introduces the NodeMCU(ESP8266) microcontroller, a variety of sensors (including the DHT11, MQ135, and PIR), a display, and a buzzer all working together to create a novel smart ...

NodeMCU ESP8266 Module; DHT11 Sensor; Jumpers . Circuit Diagram . There will be a few steps before starting to program ESP8266 for Logging Temperature Data on Google Sheet. We will be needing few ...

In addition to the NodeMCU board, [Shyam] adds a DHT11 sensor and SSD1306 OLED display. He’s provided a wiring diagram in the repository along with the Arduino code for the ESP8266, ...