Description

Abstract

Nowadays in cities, environmental pollution is increasing day to day life. In this development, we are going to controlling the environmental pollution that DHT 11 sensor, gas sensor, LDR sensor, and alert system (buzzer). DHT 11 sensor has measured the temperature and humidity. The GAS sensor is measured by the co2 in the air. The LDR sensor is measured by light density. If anyone sensor value is critical condition means the buzzer will blow at the same time and data are sent to the IOT platform MQTT. An MQTT (Message Queuing Telemetry Transport) system consists of clients communicating with a server. A client can change the position publisher or subscriber. Each client can connect to the MQTT broker.

Block diagram

Block diagram description

• DHT 11 sensor has measured the temperature and humidity.
• The GAS sensor is measured by the co2 in the air.
• The LDR sensor is measured by light density.
• If anyone sensor value is critical condition means the buzzer will blow at the same time and data are sent to the IOT platform MQTT.
• All sensor values upload to the MQTT server this process called the publisher.
• If a client wants to see the sensor value means subscriber topic first then only sensor value is displayed in your application.

Hardware Requirments

• Nodmcu ESp8266
• DHT 11sensor
• GAS  sensor
• LDR sensor
• Buzzer

Software Requirments

• Arduino IDE
• MQTT app
• ORCAD Design