### Project 13 LM35 Temperature Sensor

**1.Introduction**

LM35 is a common and easy-to-use temperature sensor.

In this project, we use graphical programming to read out analog value of temperature measured by LM35 temperature sensor module. Then after a serials of calculation we get specific temperature value. Finally display the value on serial monitor.

**2.Materials Required**

1. KEYESTUDIO UNO Control Board *1
2. V5 Sensor Shield*1
3. LM35 Temperature Module*1
4. Female to Female Dupont Line*3

**3.Connection Diagram**

Let’s start experiment, and connect ultrasonic waves to ARDUINO referring to the following figure.

![](media/image-20251201162906592.png)

![](media/image-20251201162925288.png)

**4.Sample Code**

```c
int _ABVAR_1_val = 0 ;
int _ABVAR_2_dat = 0 ;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  _ABVAR_1_val = analogRead(0) ;
  _ABVAR_2_dat = ( ( 5 * _ABVAR_1_val ) / 10 ) ;
  Serial.print("TEMP=");
  Serial.print(_ABVAR_2_dat);
  Serial.println();
  delay( 100 );
}
```

**5.Result**

After the program is downloaded, you can open the serial monitor to see current temperature.

![](media/image-20251201163525620.png)