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Android Mobile and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring System with ATmega32 and 7 Segment Display using HC-05 Bluetooth

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In this project, we will learn about Android Mobile and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring System with AVR ATmega32 Microcontroller and 7 Segment Display using HC-05 Bluetooth. Here, we will display and monitor the concentration of smoke wirelessly from an Android Mobile using Bluetooth and 4 multiplexed Common Anode 7-Segment Displays.

Since, the output of the Analog MQ-2 Smoke Sensor is analog in nature and these analog signals cannot be processed directly by the ATmega32 microcontroller. So, first this signal needs to be converted to digital value to be processed by the microcontroller. The conversion can be done with the help of ADC of the AVR ATmega32 microcontroller. After converting the analog signal to digital, the microcontroller will send the digital value of Analog MQ-2 Smoke Sensor to the HC-05 bluetooth through USART communication protocol. This HC-05 bluetooth transmits the digital value of Analog MQ-2 Smoke Sensor wirelesslyto the bluetooth of the Android Mobile. The bluetooth of the Android Mobile receives the digital value of Analog MQ-2 Smoke Sensor through an Android App called Bluetooth Terminal and displays it. Apart from Andoid Mobile, microcontroller will display the Analog MQ-2 Smoke Sensor value in 4 multiplexed Common Anode 7-Segment Displays. In this way, the concentration of smoke is monitored from the Andoid Mobile wirelessly and from 4 multiplexed Common Anode 7-Segment Displays.

Now, we will place a burning incense stick near Analog MQ-2 Smoke Sensor and we will see the change in concentration of smoke in Andoid Mobile and 7-Segment Displays.

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega32 1pc
AVR USB Programmer 1pc
Analog MQ-2 General Combustible Gas Sensor Board 1pc
Quad 7-Segment Display Board 1pc
HC-05 Bluetooth Board 1pc
12V, 1A DC SMPS Adaptor 1pc
10 to 10 FRC Female to Female Connector 2pc
1 to 1 Connector-Female to Female 11pc

Circuit Diagram

Video

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Android Mobile and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring System with ATmega32 and 7 Segment Display using HC-05 Bluetooth
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