NTC 센서 4개 온도 데이터 수신

아두이노  +  NTC 온도센서

 

온도 4개 값을 그래프로 표시합니다.

int ThermistorPin = 0;
int Vo, Vout;
float R1 = 10000;
float logR2, R2, T,VR,VRT; float T2, T3, T4;
float Temp = 0;
float c1 = 1.126260975e-03, c2 = 2.354310794e-04, c3 = 0.7596803406e-07;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
  Vo = analogRead(0);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T = T - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT; 

  Vo = analogRead(1);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T2 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T2 = T2 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT; 

  Vo = analogRead(2);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T3 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T3 = T3 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT;   

  Vo = analogRead(3);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T4 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T4 = T4 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT;   

  

  Serial.print(T); Serial.print(',');
  Serial.print(T2); Serial.print(',');
  Serial.print(T3); Serial.print(',');
  Serial.print(T4); Serial.print(',');
  Serial.println();

  delay(1000);
}

평균값을 이용하여 그래프로 표시합니다.

int ThermistorPin = 0;
int Vo, Vout;
float R1 = 10000;
float logR2, R2, T,VR,VRT; float T2, T3, T4;
float Temp = 0;
float c1 = 1.126260975e-03, c2 = 2.354310794e-04, c3 = 0.7596803406e-07;

#define MAX_NTC 4
#define MAX_NUM 10
float average[MAX_NTC][MAX_NUM];

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

int timeout = 0;
void loop() {
  // put your main code here, to run repeatedly:
  Vo = analogRead(0);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T = T - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT; 

  Vo = analogRead(1);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T2 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T2 = T2 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT; 

  Vo = analogRead(2);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T3 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T3 = T3 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT;   

  Vo = analogRead(3);
  Vout = Vo; // 1023-Vo;
  R2 = R1 * (1023.0 / (float)Vout - 1.0);
  logR2 = log(R2);
  
  T4 = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
  T4 = T4 - 273.15;
  //T = (T * 9.0)/ 5.0 + 32.0; //화씨 온도 계산, 주석 처리 
  VRT = (5.00 / 1023.00) * Vo; //Conversion to voltage 
  VR = 5 - VRT;   

  memmove(&average[0][1], &average[0][0], (MAX_NUM-1)*sizeof(float));
  memmove(&average[1][1], &average[1][0], (MAX_NUM-1)*sizeof(float));
  memmove(&average[2][1], &average[2][0], (MAX_NUM-1)*sizeof(float));
  memmove(&average[3][1], &average[3][0], (MAX_NUM-1)*sizeof(float));

  average[0][0] = T;
  average[1][0] = T2;
  average[2][0] = T3;
  average[3][0] = T4;

  timeout += 1;

  if(timeout % 10 == 0) {
  
    float total[MAX_NUM] = { 0x00, };
    for(int i = 0; i < MAX_NUM; i++)
    {
      total[0] += average[0][i];
      total[1] += average[1][i];
      total[2] += average[2][i];
      total[3] += average[3][i];
    }
  
    Serial.print(total[0]/MAX_NUM); Serial.print(',');
    Serial.print(total[1]/MAX_NUM); Serial.print(',');
    Serial.print(total[2]/MAX_NUM); Serial.print(',');
    Serial.print(total[3]/MAX_NUM); Serial.print(',');
    Serial.println(); 
  }
  

/*
  Serial.print(T); Serial.print(',');
  Serial.print(T2); Serial.print(',');
  Serial.print(T3); Serial.print(',');
  Serial.print(T4); Serial.print(',');
  Serial.println(); */

  delay(1000);
}

 보드 연결

아두이노 보드와 온도센서를 연결합니다.

아날로그핀 A0, A1, A2, A3을 NTC 10K 온도센서와 연결합니다.

www.circuitbasics.com/arduino-thermistor-temperature-sensor-tutorial/

Make an Arduino Temperature Sensor (Thermistor Tutorial)