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  1. #include <LiquidCrystal.h>
  2. LiquidCrystal lcd(12,11,5,4,10,13);
  3.  
  4. const int sens=A0;
  5. float RT, VR, ln, TX, T0, VRT;
  6. int VCC=5;
  7. int RTO=10000;
  8. int B=3977;
  9. int R=10000;
  10.  
  11. void setup() {
  12.   // put your setup code here, to run once:
  13.   lcd.begin(16,2);  //imposta il numero di colonne e righe
  14.   analogReference(EXTERNAL); //il pin aref รจ collegato alla tensione di riferimento di 3,3v
  15.   T0 = 25 + 273.15;  
  16. }
  17.  
  18. void loop() {
  19.   // put your main code here, to run repeatedly:
  20.  
  21.  
  22.   VRT = analogRead(A0);              //Acquisition analog value of VRT
  23.   VRT = (5.00 / 1023.00) * VRT;      //Conversion to voltage
  24.   VR = VCC - VRT;
  25.   RT = VRT / (VR / R);               //Resistance of RT
  26.  
  27.   ln = log(RT / RTO);
  28.   TX = (1 / ((ln / B) + (1 / T0))); //Temperature from thermistor
  29.  
  30.   TX = TX - 273.15;                 //Conversion to Celsius
  31.  
  32.  
  33.   lcd.setCursor(0,0);
  34.   lcd.print("temperatura in Celsius: ");
  35.   lcd.setCursor(0,1);
  36.   lcd.print(TX);
  37. }
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