M5NanoC6で温度センサー、Grove - Temperature Sensor V1.2で遊ぶ

x かころぐみよ

参考

結果

プログラム(おもに3.3V化と電圧化)

// 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 = A0;     // Grove - Temperature Sensor connect to A0
const int pinTempSensor = 1;     // Grove - Temperature Sensor connect to G1


#if defined(ARDUINO_ARCH_AVR)
#define debug  Serial
#elif defined(ARDUINO_ARCH_SAMD) ||  defined(ARDUINO_ARCH_SAM)
#define debug  SerialUSB
#else
#define debug  Serial
#endif

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

void loop()
{
    int a = analogRead(pinTempSensor);

    //float R = 1023.0/a-1.0;
    //R = R0*R;
    float R,v1,a1,o1; 
    v1 = ((float)a) * 0.001; //電圧を求める
    a1 = v1 / 100000.0;           //電流を求める
    o1 = 5.0 / a1;                //全体の抵抗を求める
    R = o1 - 100000.0;    //全体の抵抗から検出抵抗を引く

    float temperature = 1.0/(log(R/R0)/B+1/298.15)-273.15; // convert to temperature via datasheet

    Serial.print("temperature = ");
    Serial.println(temperature);

    delay(100);
}