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PC and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring and Alarm System with ATmega32 using Series 2 Zig Bee

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In this project, we will learn how to make a PC and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring and Alarm System with AVR ATmega32 Microcontroller using Series 2 Zig Bee. Here, we will display and monitor the concentration of Hydrogen Gas wirelessly from a PC/Laptop using Zig Bee. Also, we will compare the concentration of Hydrogen Gas with a threshold value continuously and when the concentration of Hydrogen Gas is greater than the threshold value, alert signal is sent to buzzer and to PC wirelessly.

Since, the output of the Analog MQ-8 Hydrogen Gas 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-8 Hydrogen Gas Sensor to the Zig Bee through USART communication protocol. This Zig Bee transmits the digital value of Analog MQ-8 Hydrogen Gas 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-8 Hydrogen Gas 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-8 Hydrogen Gas Sensor and displays it. Also, the ATmega32 microcontroller will compare the output of Analog MQ-8 Hydrogen Gas Sensor value with a threshold value(here the threshold value is 700) continuously and when the Analog MQ-8 Hydrogen Gas Sensor output value is greater than the threshold value, at that time the ATmega32 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 use some source of Hydrogen Gas near Analog MQ-8 Hydrogen Gas Sensor and we will see the change in concentration of Hydrogen Gas in PC and buzzer.

Softwares Required

Hardwares Required

Name Quantity
AVR Trainer Board-100 with ATmega32 1pc
AVR USB Programmer 1pc
Analog MQ-8 Hydrogen Gas Sensor Board 1pc
XBee Series 2 (Configured Pair) 1pc
Zig Bee Base Board with USB Interface 2pc
12V, 1A DC SMPS Adaptor 1pc
USB AM-BM Cable 1pc
10 to 10 FRC Female to Female Connector 1pc
1 to 1 Connector-Female to Female 10pc

Circuit Diagram

Video

Downloads

PC and Analog MQ-8 Hydrogen Gas Sensor based Wireless Hydrogen Gas Monitoring and Alarm System with ATmega32 using Series 2 Zig Bee
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