Circuit Documentation

Summary

This document provides a detailed description of a circuit that includes an ESP8266 NodeMCU microcontroller and an MQ2 gas sensor. The ESP8266 NodeMCU is used to read analog data from the MQ2 sensor, which detects gas levels. The components are interconnected to facilitate power supply and data communication.

Component List

ESP8266 NodeMCU

• Description: A low-cost Wi-Fi microcontroller with GPIO, ADC, and other interfaces.
• Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

MQ2 Gas Sensor

• Description: A gas sensor that detects LPG, i-butane, propane, methane, alcohol, hydrogen, and smoke.
• Pins: VCC, GND, AOUT, DOUT

Wiring Details

ESP8266 NodeMCU

• 3V3: Connected to VCC of MQ2
• GND: Connected to GND of MQ2
• A0: Connected to AOUT of MQ2

MQ2 Gas Sensor

• VCC: Connected to 3V3 of ESP8266 NodeMCU
• GND: Connected to GND of ESP8266 NodeMCU
• AOUT: Connected to A0 of ESP8266 NodeMCU

Code

There is no code provided for this circuit.