将3个独立运行的DataLogger代码合并为一个时功能异常，寻求解决方案

现有代码核心问题 #

• 结构错误：运动检测逻辑完全游离在setup和自定义函数之外，不属于任何函数作用域，直接编译失败
• 引脚配置缺失：LED、运动传感器未设置输入输出模式，硬件无法正常工作
• 引脚冲突：温度、光敏、运动三个传感器全部定义为读取A0，数据互相干扰无法正常读数
• 语法错误：loop、measure函数大括号不闭合，字符串内强制换行导致CSV行断裂，编译无法通过
• 逻辑错误：SD卡文件仅在setup阶段打开一次，异常断电极易丢失数据；多处delay堆叠导致采样时序完全混乱
• 表头不匹配：仅写入亮度表头，后续写入温度、运动数据时CSV结构混乱无法正常读取

修复后完整可运行代码 #

#include <SPI.h> 
#include <SD.h>  
#include "RTClib.h"

RTC_DS1307 rtc;

// 引脚定义 三个传感器分开引脚避免冲突
const int pinLight = A0;    // 光敏传感器
const int pinTemp = A2;     // 温度传感器
const int pinMotion = A1;   // 运动传感器
const int pinLed = 13;                
const int chipSelect = 10;

int motionState = LOW;            
const char* filename = "DataLogger.csv";

void setup() {
  Serial.begin(9600);
  #ifndef ESP8266
  while (!Serial); 
  #endif

  // 初始化RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  if (!rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  // 引脚模式配置
  pinMode(chipSelect, OUTPUT);
  pinMode(pinLed, OUTPUT);
  pinMode(pinMotion, INPUT);

  // 初始化SD卡
  if (!SD.begin(chipSelect)) {
    Serial.println("Error : Push the reset button");
    for (;;); 
  }

  // 写入CSV表头
  File file = SD.open(filename, FILE_WRITE);
  if (file) {
    if (file.size() == 0) {
      file.println("类型,数值,时间,日期");
    }
    file.close();
  }
}

void loop() { 
  DateTime now = rtc.now();
  // 1. 采集并记录亮度
  readAndLogLight(now);
  // 2. 采集并记录温度
  readAndLogTemp(now);
  // 3. 检测并记录运动
  checkMotion(now);
  // 每秒采样一次
  delay(1000);
}

// 读取亮度并写入SD卡
void readAndLogLight(DateTime time) {
  int lightValue = analogRead(pinLight);
  String logStr = String("亮度,") + String(lightValue) + "," + time.timestamp(DateTime::TIMESTAMP_TIME) + "," + time.timestamp(DateTime::TIMESTAMP_DATE);
  Serial.println(logStr);
  File file = SD.open(filename, FILE_WRITE);
  if (file) {
    file.println(logStr);
    file.close();
  }
}

// 读取温度并写入SD卡
void readAndLogTemp(DateTime time) {
  int sensorInput = analogRead(pinTemp);
  double temp = (double)sensorInput / 1024 * 5;
  temp = (temp - 0.5) * 100;
  String logStr = String("温度,") + String(temp, 2) + "," + time.timestamp(DateTime::TIMESTAMP_TIME) + "," + time.timestamp(DateTime::TIMESTAMP_DATE);
  Serial.println(logStr);
  File file = SD.open(filename, FILE_WRITE);
  if (file) {
    file.println(logStr);
    file.close();
  }
}

// 检测运动并写入SD卡
void checkMotion(DateTime time) {
  int val = digitalRead(pinMotion);
  if (val == HIGH) {
    digitalWrite(pinLed, HIGH);
    if (motionState == LOW) { 
      String logStr = String("运动,检测到,") + time.timestamp(DateTime::TIMESTAMP_TIME) + "," + time.timestamp(DateTime::TIMESTAMP_DATE);
      Serial.println(logStr);
      File file = SD.open(filename, FILE_WRITE);
      if (file) {
        file.println(logStr);
        file.close();
      }
      motionState = HIGH;
    }
  } else {
    digitalWrite(pinLed, LOW);
    if (motionState == HIGH){
      String logStr = String("运动,停止,") + time.timestamp(DateTime::TIMESTAMP_TIME) + "," + time.timestamp(DateTime::TIMESTAMP_DATE);
      Serial.println(logStr);
      motionState = LOW;
    }
  }
}

硬件接线注意事项 #

• 光敏传感器输出接A0
• 温度传感器输出接A2
• 人体运动传感器输出接A1
• 所有传感器共地共3.3V/5V（根据传感器参数选择供电电压）

内容的提问来源于stack exchange，提问作者Nick Sharman