NTC Temperature sensor module. The sensor resistance is approximately 10 k ohm at room temperature. The NTC sensor is connected between the two outer pins. A fixed 10 K ohm resistor connected between the middle pin and the ‘S’ pin is included on the module. This simplifies the building of a measurement bridge circuit.
 Temperature range: -55°C to +125°C
 Accuracy: +/- 0.5°C

First, the module introduces The module is based on the thermistor (resistance increases with the ambient temperature changes) works, a sense of real-time To know the temperature of the surrounding environment changes, we send the data to the Arduino analog IO, then come down as long as we go through Jane Single programming will be able to convert the sensor output data Celsius temperature values and displayed, it is still easy to use, It effectively, thereby widely used in gardening, home alarm systems and other devices. Second, the use And the general temperature sensor is the same, are three-line package, when we use the power cord connected OK signal output Into the end on the line, because the module output is an analog signal, we want to signal output terminal connected to the Arduino analog IO On sampling, so as to correctly read the temperature value; Up to this point generally know how to use it, then we need to know about how it is the next temperature measurement?

Specifications

• The temperature sensor is a NTC thermistor
• Multi-point temperature measurement Measures temperatures: -55°C / +125°C
• Accuracy: + / - 0.5°C

Hardware devices

• Arduino controller × 1
• USB data cable × 1
• the analog temperature sensor module × 1

We must have the above things can test to see if an original is a simple thermal how to help us measure the temperature.

Schematic

• Arduino pin analoog A5 --> module S (Signal)
• Arduino pin GND - module -
• Arduino pin 5+ --> middel pin 5V

This code don't give the right values, in a room that was kind of ok it gave a tempature of 10 C. That isn't right so the calculation in the code should be checked.

#include 
	
	
	
	
 
int
	
	
	
	 sensorPin =
	
	
	
	 A5;
	
	
	
	 // select the input pin for the potentiometer
	
	
	
	
 
double
	
	
	
	 Thermistor(
	
	
	
	int
	
	
	
	 RawADC)
	
	
	
	 {
	
	
	
	
  double
	
	
	
	 Temp;
	
	
	
	
  Temp =
	
	
	
	 log
	
	
	
	(
	
	
	
	10000.0
	
	
	
	*
	
	
	
	((
	
	
	
	1024.0
	
	
	
	/
	
	
	
	RawADC-
	
	
	
	1
	
	
	
	)))
	
	
	
	;
	
	
	
	 
  Temp =
	
	
	
	 1
	
	
	
	 /
	
	
	
	 (
	
	
	
	0.001129148
	
	
	
	 +
	
	
	
	 (
	
	
	
	0.000234125
	
	
	
	 +
	
	
	
	 (
	
	
	
	0.0000000876741
	
	
	
	 *
	
	
	
	 Temp *
	
	
	
	 Temp ))
	
	
	
	*
	
	
	
	 Temp )
	
	
	
	;
	
	
	
	
  Temp =
	
	
	
	 Temp -
	
	
	
	 273.15
	
	
	
	;
	
	
	
	            // Convert Kelvin to Celcius
	
	
	
	
   //Temp = (Temp * 9.0)/ 5.0 + 32.0; // Convert Celcius to Fahrenheit
	
	
	
	
   return
	
	
	
	 Temp;
	
	
	
	
}
	
	
	
	
 
void
	
	
	
	 setup()
	
	
	
	 {
	
	
	
	
 Serial.begin
	
	
	
	(
	
	
	
	9600
	
	
	
	)
	
	
	
	;
	
	
	
	
}
	
	
	
	
 
void
	
	
	
	 loop()
	
	
	
	 {
	
	
	
	
 int
	
	
	
	 readVal=
	
	
	
	analogRead(
	
	
	
	sensorPin)
	
	
	
	;
	
	
	
	
 double
	
	
	
	 temp =
	
	
	
	  Thermistor(
	
	
	
	readVal)
	
	
	
	;
	
	
	
	
 
 Serial.println
	
	
	
	(
	
	
	
	temp)
	
	
	
	;
	
	
	
	  // display tempature
	
	
	
	
 //Serial.println(readVal);  // display tempature
	
	
	
	
 
 delay(
	
	
	
	500
	
	
	
	)
	
	
	
	;
	
	
	
	
}