The system also provides automatic safety and control features based on predefined threshold values. When gas concentration or temperature exceeds the set limits, the buzzer is activated to alert users, and an SMS notification is sent to a predefined mobile number using the GSM module. In addition, the system automatically turns ON a cooling fan during high-temperature conditions and switches ON a bulb when dangerous gas levels are detected. The entire system is controlled using Embedded C programming, providing an efficient, low-cost, and reliable solution for smart environmental monitoring, industrial safety, and home automation application.

Objectives:

1. To monitor gas leakage and temperature using sensors.
2. To detect harmful gases using MQ-6 and MQ-9 gas sensors.
3. To measure environmental temperature using the LM35 sensor.
4. To display sensor readings on an LCD screen.
5. To upload real-time data to the ThingSpeak cloud platform using Wi-Fi.
6. To send SMS alerts using the GSM module during abnormal conditions.
7. To activate a buzzer for warning alerts when threshold values are exceeded.
8. To automatically control a cooling fan based on temperature levels.
9. To switch ON a bulb when dangerous gas levels are detected.
10. To develop a smart and automated environmental monitoring system using Arduino UNO.

The main blocks of this project are:

• Power Supply.
• Arduino UNO.
• ESP8266 WI-FI module.
• MQ-9 sensor.
• MQ-6 sensor.
• LM35 Temperature sensor.
• GSM.
• Buzzer.
• LCD display. 
• Relay along with Bulb.
• Transistor along with Cooling fan.

Software’s used:

• Arduino IDE for compiling and dumping code into Microcontroller.
• Express SCH for Circuit design.

video:

The main controlling device of the project is arduino.MQ-135, MQ-6, LCD display and relay through air purifier inter faced to the arduino.Arduino will continuously read the air quality from sensors and will be display on LCD and upload them into the blynk mobile application through ESP8266 WI-FI module.User can access this device from anywhere in the world and based on that user will control the air purifier from blynk app.Here works as a switch to ON/OFF the air purifier based on the received signal from arduino.Solar energy is uses to charge the battery for through charging circuit and this battery power is used to run this air purifier.

The main objective of this project:

• Real time outdoor air quality monitoring and controlling system.
• By using this project, we can reduce the health problems.
• Real-time outdoor air quality monitoring system.
• Sensor based air purifier.
• Display the sensor data on LCD.
• Using MQ135 sensor and MQ-6 for monitoring air quality.
• Using SOLAR renewable energy.
• Monitoring the air quality parameters into the blynk mobile application through ESP8266 WI-FI module.
• Using ESP8266 WI-FI module to upload the data into the blynk app.
• Controlling air purifier from blynk mobile application.
• Using arduino UNO to achieve this task.

The major building blocks of this project are:

• Power Supply.
• Arduino UNO Microcontroller.
• LCD display.
• MQ-6.
• MQ135
• Filter.
• Relay.
• Solar.
• Charging circuit.
• battery.
• ESP8266 WI-FI.

Software’s used:

1. Embedded C programming.
2. ARDUINO IDE STUDIO COMPILER for dumping code into Micro controller.
3. Express SCH for Circuit design.

RegulatedPower Supply:

Block diagram:

video: