Android Mobile and LM35 Temperature Sensor based Wireless Temperature Monitoring System with AVR ATmega16 Microcontroller and LCD Display using HC-05 Bluetooth

Android Mobile and LM35 Temperature Sensor based Wireless Temperature Monitoring System with ATmega16 and LCD Display using HC-05 Bluetooth

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In this project, we will learn Android Mobile and LM35 Temperature Sensor based Wireless Temperature Monitoring System with AVR ATmega16 Microcontroller and LCD Display using HC-05 Bluetooth. Here, we will display and monitor the temperature of the surrounding or any other material to which the LM35 temperature sensor is connected for its temperature measurement in degree centigrade wirelessly from from an Android Mobile using HC-05 Bluetooth and 16X2 Alphanumeric LCD.

Since the output of LM35 temperature sensor is analog in nature and ATmega16 microcontroller cannot process the analog signal directly. So, first it will convert the analog output of LM35 temperature sensor to digital values using its analog to digital converter and then it will process the digital value to convert the digital value in degree centigrade value. After converting the analog signal to digital, the ATmega16 microcontroller will send the digital value of LM35 Temperature Sensor to the HC-05 Bluetooth through USART communication protocol. TThis HC-05 Bluetooth transmits the digital value of LM35 temperature sensor wirelessly to the bluetooth of the Android Mobile. The bluetooth of the Android Mobile receives the digital value of LM35 temperature sensor through an Android App called Bluetooth Terminal and displays it. Apart from Andoid Mobile, ATmega16 microcontroller will display the LM35 Temperature Sensor value in an alphanumeric LCD. In this way, the temperature of the surrounding or temperature of the material to which the sensor is attached is monitored wirelessly from the Andoid Mobile and alphanumeric LCD.

Now, lit a match stick or lighter near the LM35 temperature sensor or near the material to which sensor is attached and see the change in temperature in the Andoid Mobile and Alphanumeric LCD.

Softwares Required

Hardwares Required

Name	Quantity
AVR Trainer Board-100 with ATmega16	1pc
AVR USB Programmer	1pc
LM35 Temperature Sensor	1pc
RG1602A 16X2 Alphanumeric LCD Green	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	10pc