Grove - Temperature Sensor V1.2
Introduction
The Grove - Temperature Sensor uses a Thermistor to detect the ambient
temperature. The resistance of a thermistor will increase when the ambient
temperature decreases. It’s this characteristic that we use to calculate the ambient
temperature. The detectable range of this sensor is -40 - 125ºC, and the accuracy is
±1.5ºC
Note: This wiki works with Grove - Temperature sensor V1.1 as well, for V1.0 please
refer to Grove - Temperature Sensor
Specifications
• Voltag e: 3.3 ~ 5V
• Zero power resistance: 100 KΩ
• Resistance Tolerance: ±1%
• Operating temperature range: -40 ~ +125 ℃
• Nominal B-Constant： 4250 ~ 4299K
Tip
More details about Grove modules please refer to Grove System
Getting Started
After this section, you can make Grove - Temperature Sensor V1.1/1.2 run with only
few steps.
Preparations
Now we are making a simple demo to get data from Grove - Temperature Sensor
V1.1/1.2 require following modules.
• Seeeduino v4.2
Seeeduino V4.2 is fully compatible with Arduino.If this is your first time using Arduino,
Please refer to here to start your Arduino journey.
Hardware Connection
Just connect Grove - Temperature Sensor into A5 connector of Seeeduino v4.2 as
shown below:
Download
Launch Arduino IDE and click File>New to open a new page.
Then copy below code into Arduino IDE:
// Demo code for Grove - Temperature Sensor V1.1/1.2
// Loovee @ 2015-8-26
#include <math.h>
const int B=4275; // B value of the thermistor
const int R0 = 100000; // R0 = 100k
const int pinTempSensor = A5; // Grove - Temperature Sensor connect to A5
void setup()
{
Serial.begin(9600);
}
void loop()
{
int a = analogRead(pinTempSensor );
float R = 1023.0/((float)a)-1.0;
R = 100000.0*R;
float temperature=1.0/(log(R/100000.0)/B+1/298.15)-273.15;//convert to temperature via datasheet
;
Serial.print("temperature = ");
Serial.println(temperature);
delay(100);
}
Click Tools>Board to choose Arduino UNO and select respective serial port.
Now click Upload(CTRL+U) to burn testing code. Please refer to here for any error
prompt and you can also add comment on forum
Review Results
After upload completed, Open Serial Monitor of your Arduino IDE, you can get the
temperature:
Reference
If you want to know how the algorithm of temperature coming, please refer to the
below image:
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