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Wi-Fi Enabled Air Quality and Atmospheric Pressure Monitoring System using ESP-8266, MQ-7, and BMP180

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Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an MQ-7 gas sensor, a BMP180 pressure sensor, and an ESP-8266 microcontroller. The circuit is designed to read gas concentration and atmospheric pressure data and potentially transmit this data over a network using the ESP-8266.

Component List

MQ-7 Breakout

  • Description: Gas sensor for detecting carbon monoxide (CO) levels.
  • Pins: VCC, GND, DO, AO

BMP180

  • Description: Barometric pressure sensor.
  • Pins: 3.3, SDA, SCL, GND, VCC

ESP-8266 Controller

  • Description: Wi-Fi microcontroller for IoT applications.
  • Pins: A0, RSV, SD3, SD5, SD1, CMD, D0, D1, D2, D3, D4, 3V3, GND, D5, D6, SD0, CLK, RST, EN, D7, D8, RX, TX, Vin, 5V

Wiring Details

MQ-7 Breakout

  • VCC: Connected to Vin of ESP-8266 Controller
  • GND: Connected to GND of ESP-8266 Controller
  • AO: Connected to A0 of ESP-8266 Controller

BMP180

  • 3.3: Connected to 3V3 of ESP-8266 Controller
  • SDA: Connected to D2 of ESP-8266 Controller
  • SCL: Connected to D1 of ESP-8266 Controller
  • GND: Connected to GND of ESP-8266 Controller

ESP-8266 Controller

  • Vin: Connected to VCC of MQ-7 Breakout
  • GND: Connected to GND of MQ-7 Breakout and GND of BMP180
  • A0: Connected to AO of MQ-7 Breakout
  • 3V3: Connected to 3.3 of BMP180
  • D2: Connected to SDA of BMP180
  • D1: Connected to SCL of BMP180

Code

No code is provided for this circuit.