LM75 Temperature Sensor Features
LM75 is a temperature sensor that can measure temperature range from -25 to +125 degrees Celsius. This sensor support I2C communication protocol and you can communicate with this module using two SDA and SCL pins to read the ambient temperature.
You can download the datasheet of this module here.
LM75 Temperature Sensor Pinout
This sensor has 5 pins:
- VCC: Module power supply – 3.3-5 V
- GND: Ground
- SDA: Data pin for I2C communication
- SLC: Clock pin for I2C communication
- OS: Over-Temperature Shutdown can be used as an interrupt.
You can see pinout of this module in the image below.
Required Materials
Hardware Components
Software Apps
Interfacing LM75 Temperature Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to LM75 sensor. Connect wires accordingly.
Step 2: Installing Library
Install the following library on Arduino.
Tip
If you need more help with installing a library on Arduino, read this tutorial: How to Install an Arduino Library
Step 3: Code
Upload the following code to your Arduino. This code displays the read temperature in the serial monitor.
/*
LM75 Temperature Sensor
modified on 19 Sep 2020
by Mohammad Reza Akbari @ Electropeak
Home
*/
#include <Temperature_LM75_Derived.h>
Generic_LM75 LM75;
void setup() {
Serial.begin(9600);
Wire.begin();
delay(100);
}
void loop() {
Serial.print("Temperature = ");
Serial.print(LM75.readTemperatureC());
Serial.println(" C");
delay(300 );
}
After running the code, you will see the following image in the serial output.
