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PC and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring and Alarm System with ATmega16 and 7 Segment Display using Series 2 Zig Bee

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In this project, we will learn how to make a PC and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring and Alarm System with AVR ATmega16 Microcontroller and 7 Segment Display using Series 2 Zig Bee. Here, we will display and monitor the concentration of smoke wirelessly from a PC/Laptop using Zig Bee and 4 multiplexed Common Anode 7-Segment Displays. Also, we will compare the concentration of smoke with a threshold value continuously and when the concentration of smoke is greater than the threshold value, alert signal is sent to buzzer and to PC wirelessly.

Since, the output of the Analog MQ-2 Smoke Sensor is analog in nature and these analog signals cannot be processed directly by the ATmega16 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 ATmega16 microcontroller. After converting the analog signal to digital, the microcontroller will send the digital value of Analog MQ-2 Smoke Sensor to the Zig Bee through USART communication protocol. This Zig Bee transmits the digital value of Analog MQ-2 Smoke Sensor wirelessly to another Zig Bee connected with the PC/Laptop. At the PC/Laptop end, Zig Bee receives the digital value of Analog MQ-2 Smoke Sensor and transmits that to the PC/Laptop through a USB cable. In the PC, the RealTerm Software receives the digital value of Analog MQ-2 Smoke Sensor and displays it. Apart from PC/Laptop, microcontroller will display the Analog MQ-2 Smoke Sensor value in 4 multiplexed Common Anode 7-Segment Displays. Also, the ATmega16 microcontroller will compare the output of Analog MQ-2 Smoke Sensor value with a threshold value(here the threshold value is 700) continuously and when the Analog MQ-2 Smoke Sensor output value is greater than the threshold value, at that time the ATmega16 microcontroller will send alert signal to buzzer and to PC through Zig Bee. After getting the alert signal, buzzer starts beeping and PC displays the alert signal in the RealTerm Software.

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 PC, 7-Segment Displays and Buzzer.

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega16 1pc
AVR USB Programmer 1pc
Analog MQ-2 General Combustible Gas Sensor Board 1pc
Quad 7-Segment Display Board 1pc
XBee Series 2 (Configured Pair) 1pc
Zig Bee Base Board with USB Interface 1pc
12V, 1A DC SMPS Adaptor 1pc
USB AM-BM Cable 1pc
10 to 10 FRC Female to Female Connector 2pc
1 to 1 Connector-Female to Female 14pc

Circuit Diagram

Video

Downloads

PC and Analog MQ-2 Smoke Sensor based Wireless Smoke Monitoring and Alarm System with ATmega16 and 7 Segment Display using Series 2 Zig Bee
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