Air-Quality

Air quality monitoring using ESP8266 and PMS5003 sensor

This project measures particulate matter (PM1.0, PM2.5, PM10) using a PMS5003 sensor connected to an ESP8266.
Data is averaged and sent to ThingSpeak for logging and visualization.

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📦 Hardware Components

• Board: ESP8266 (NodeMCU or Wemos D1 Mini)
• Sensor: PMS5003 (Particulate Matter Sensor)
• Power supply: 5V (USB or external)
• WiFi: Required for sending data to ThingSpeak

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💻 Software Overview

The code is written for the Arduino IDE and uses the following libraries:

• ESP8266WiFi.h – for Wi-Fi connectivity
• ThingSpeak.h – to send data to ThingSpeak
• PMS.h – for reading data from PMS5003 sensor

Setup steps:

1. Open the project in the Arduino IDE
2. Select your ESP8266 board (e.g., NodeMCU 1.0)
3. Install dependencies via Library Manager
4. Enter your Wi-Fi SSID, password, and ThingSpeak API keys in the code
5. Upload the sketch (disconnect PMS5003 during upload)
6. Open Serial Monitor to debug and view readings

⚠️ Connect the rst pin to d0 (for sleep mode) only after uploading the code.

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📡 Data Flow

1. The sensor wakes up and stabilizes for 3 minutes
2. 10 readings are collected for PM1.0, PM2.5, and PM10
3. Averages are calculated
4. Data is sent to ThingSpeak using writeRaw()
5. The ESP8266 goes to deep sleep for ~24 minutes

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🌐 ThingSpeak Integration

Make sure you:

• Create a ThingSpeak channel with three fields (PM1.0, PM2.5, PM10)
• Copy your channel number and write API key into the sketch

Example of data string sent:

api_key=XXXX&field1=12.5&field2=18.3&field3=21.7

Air quality graph (from the ThingSpeak channel)

💤 Power Saving

The ESP8266 uses ESP.deepSleep() for low-power operation.
This makes the system suitable for battery-powered deployments.

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Support

If you find it useful, give it a ⭐ !

Feel free to fork it or open issues for feedback and suggestions.