Arduino Nano - ADT75 Temperature Sensor Tutorial

ADT75 is a highly accurate, digital temperature sensor. It comprises of a band gap temperature sensor and a 12-bit analog to digital converter for monitoring and digitizing the temperature. Its highly sensitive sensor makes it competent enough to measure the ambient temperature accurately. Here is the demonstration with Arduino Nano.

1. Arduino Nano

2. ADT75

3. I²C Cable

4. I²C Shield for Arduino Nano

Take an I2C shield for Arduino Nano and gently push it over the pins of Nano.

Then connect the one end of I2C cable to ADT75 sensor and the other end to the I2C shield.

Connections are shown in the picture above.

The arduino code for ADT75 can be downloaded from our github repository- Dcube Store.

Here is the link for the same :

https://github.com/DcubeTechVentures/ADT75/blob/master/Arduino/ADT75.ino

We include library Wire.h to facilitate the I2c communication of the sensor with the Arduino board.

You can also copy the code from here, it is given as follows:

// Distributed with a free-will license.

// Use it any way you want, profit or free, provided it fits in the licenses of its associated works.

// ADT75

// This code is designed to work with the ADT75_I2CS I2C Mini Module

#include

// ADT75 I2C address is 0x48(72)

#define Addr 0x48

void setup()

{

// Initialise I2C communication as Master

Wire.begin();

// Initialise serial communication, set baud rate = 9600

Serial.begin(9600);

delay(300);

}

void loop()

{

unsigned int data[2];

// Start I2C transmission

Wire.beginTransmission(Addr);

// Select data register

Wire.write(0x00);

// Stop I2C transmission

Wire.endTransmission();

// Request 2 byte of data

Wire.requestFrom(Addr, 2);

// Read 2 bytes of data

// temp msb, temp lsb

if (Wire.available() == 2)

{

data[0] = Wire.read();

data[1] = Wire.read();

}

// Convert the data to 12 bits

int temp = ((data[0] * 256) + data[1]) / 16;

if(temp > 2047)

{

temp -= 4096;

}

float cTemp = temp * 0.0625;

float fTemp = (cTemp * 1.8) + 32;

// Output data to serial monitor

Serial.print("Temperature in Celsius : ");

Serial.print(cTemp);

Serial.println(" C");

Serial.print("Temperature in Fahrenheit : ");

Serial.print(fTemp);

Serial.println(" F");

delay(500);

}

ADT75 is a highly accurate, digital temperature sensor. It can be employed in a wide range of systems including environmental control systems, computer thermal monitoring etc. It can also be incorporated in industrial process controls as well as power system monitors.