#include <Arduino.h>

// 假设热敏电阻连接在A1引脚
const int thermistorPin = A1;

// 热敏电阻的β系数，这个值应该与您的热敏电阻相匹配
const float B = 3950; 

// 25°C时的电阻值（欧姆）
const float R0 = 10000; 

// 25°C时的开尔文温度
const float T0 = 298.15;

// ADC参考电压（伏特）
const float ADC_REF_VOLTAGE = 5.0; // 根据您的Arduino板的参考电压调整

// 读取热敏电阻的ADC值
float readThermistorADC() {
  return analogRead(thermistorPin);
}

// 将ADC值转换为电压
float voltageFromADC(float adcValue) {
  return adcValue * (ADC_REF_VOLTAGE / 1023.0);
}

// 将电压转换为电阻
float resistanceFromVoltage(float voltage, float pullUpResistor) {
  return (pullUpResistor * voltage) / (ADC_REF_VOLTAGE - voltage);
}

// 计算温度
float calculateTemperature(float resistance) {
  float lnR = log(resistance / R0);
  float T = (1 / (lnR / B + 1 / T0)) - 273.15;
  return T;
}

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

void loop() {
  float adcValue = readThermistorADC();
  float voltage = voltageFromADC(adcValue);
  float resistance = resistanceFromVoltage(voltage, 10000); // 假设上拉电阻为10K
  float temperature = calculateTemperature(resistance);
  
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" C");
  
  delay(1000);
}