The term data logger (also sometimes referred to as a data recorder) is commonly used to describe a self-contained, standalone data acquisition system or device. In this paper, Temperature, Gas Data Logging System is designed to record and display sensor parameters continuously. It uses a temperature sensor to sense the room temperature and MQ2 gas sensor and stores data with Date & TIME in SD card (MMC). The Real Time Clock maintains date and time parameters. It can also send same data to android phone.
The methodology for designing the temperature, gas data logging system is discussed in detail. The code to implement the functionality of the logging system is modeled and simulated using proteus simulator. The LM35 sensor & MQ2 sensor is interfaced with the microcontroller Atmega328. The LM35 can read temperature upto 150 degree celcius. The microcontroller displays gas concentration value in PPM(Parts Per Million) on 20×4 lcd with date and time. It also records corresponding sensor data in memory card module. We can check memory card file in excel sheet in PC. The same data can also be monitored in android phone using bluetooth / Wi-Fi technology. In this application , we are using bluetooth for less complexity in implementation.
Software:
- ARDUINO IDE ( Compiler )
- EMBDDED CPP CODE
- PROTEUS SIMULATOR
Hardware :
- ATMEGA328 Microcontroller (Arduino UNO)
- LM35 Sensor
- MQ2 Gas Sensor Module
- 20×4 LCD DISPLAY
- RTC DS1307 Module
- SD Card Module
- Bluetooth Module (HC-05)
- Regulated Power Supply