c++ - Arduino WiFi ESP8266 条件日志数据失败

Question

如果标题不是 100% 准确，我很抱歉，我会尝试更好地解释它:我正在使用用 Arduino 编程的 SparkFun ESP8266 wifi 模块。它从湿度和温度传感器 DHT22 获取数据，并仅在满足特定条件时将这些数据记录到我的 Firebase 数据库(通过 Flask 应用程序):

• 温度 > 16C 并且与上次温度不同。 >= 1C
• 或:温度。 <= 16C 和与上次温度的差异。 >= 5C
• 或:湿度 < 60% 且与上次嗡嗡声不同。 >= 1%
• 或者:嗯。 >= 60% 并且与上次嗡嗡声不同。 >= 5%

int deltaT = abs(temp-temp1);
      int deltaH = abs(hum-hum1);

      if (
          (temp1 > 16.0 && deltaT >= 1)
          || (temp1 <= 16.0 && deltaT >= 5)
          || (hum1 < 60.0 && deltaH >= 1)
          || (hum1 >= 60.0 && deltaH >= 5)
        ){
// ...
}

问题是，无论温度和湿度的结果如何，我的设备仍会记录大部分数据(只是有时会起作用)。我不知道问题出在我的逻辑(if 语句)还是其他什么地方。

这是我的完整代码，你能帮我解决问题吗？

#include <DHT.h>

#include <ESP8266WiFi.h>

#include <DNSServer.h>            //Local DNS Server used for redirecting all requests to the configuration portal
#include <ESP8266WebServer.h>     //Local WebServer used to serve the configuration portal
#include <WiFiManager.h>          //https://github.com/tzapu/WiFiManager WiFi Configuration Magic

#define DHTPIN 4
#define DHTTYPE DHT22
DHT dht(DHTPIN,DHTTYPE);

float temp;
float hum;
float temp1;
float hum1;

int red_light_pin = 16;
int green_light_pin = 12;
int blue_light_pin = 13;
int switch_pin = 15;

// Server, file, and port
const char hostname[] = "laundryireland.tk";
const String uri = "/write_data?";
const String arguments[3] = {"serial=","&temp=","&hum="};
const int port = 80;

bool powerOn;

String serialNumber;

WiFiClient client;


void RGB_color(int red_light_value, int green_light_value, int blue_light_value)
 {
  analogWrite(red_light_pin, red_light_value);
  analogWrite(green_light_pin, green_light_value);
  analogWrite(blue_light_pin, blue_light_value);
}

void setup() {

  powerOn = true;

  pinMode(red_light_pin,OUTPUT);
  pinMode(green_light_pin,OUTPUT);
  pinMode(blue_light_pin,OUTPUT);
  pinMode(switch_pin,INPUT);
  RGB_color(0,0,255);

  WiFi.persistent(false);
  WiFiManager wifiManager;

  //Initialize Serial
  Serial.begin(9600);
  dht.begin();
  delay(100);

  //Connect to WiFi
  Serial.println("Connecting...");
  wifiManager.autoConnect();
  while (WiFi.status() != WL_CONNECTED ) {

    delay(500);
    Serial.print(".");
  }


  //Show that we are connected
  Serial.println("Connected!");
  Serial.println(WiFi.localIP());

  serialNumber = WiFi.macAddress();
  delay(2000);
}

void loop() {
  static unsigned long next = 0;

  int switch_state = digitalRead(switch_pin);
  int count = 0;

  while (switch_state == HIGH){
    count = count + 1;
    delay(1000);
    switch_state = digitalRead(switch_pin);
    if (count >= 3 && powerOn == true) {
      powerOn = false;
      RGB_color(255,0,0);
      Serial.println("Eco-mode active");
      break;
    } else if (count >= 3 && powerOn == false) {
      powerOn = true;
      RGB_color(0,255,0);
      Serial.println("Full throttle!");
      break;
    }
  }

  if (powerOn == true){
    unsigned long now = millis();

    if (now > next) {
      temp1 = dht.readTemperature();
      hum1 = dht.readHumidity();
      while (temp1 == NAN || hum1 == NAN){
          RGB_color(255,0,0);
          delay(5000);
          temp1 = dht.readTemperature();
          hum1 = dht.readHumidity();
        }

      int deltaT = abs(temp-temp1);
      int deltaH = abs(hum-hum1);

      if (
          (temp1 > 16.0 && deltaT >= 1)
          || (temp1 <= 16.0 && deltaT >= 5)
          || (hum1 < 60.0 && deltaH >= 1)
          || (hum1 >= 60.0 && deltaH >= 5)
        ){

        temp = temp1;
        hum = hum1;

        RGB_color(0,255,0);
        Serial.print("Temperature: ");
        Serial.println(temp);
        Serial.print("Humidity: ");
        Serial.println(hum);

        Serial.println("Testing flask ");
        if ( client.connect(hostname,port) == 0 ) {
          Serial.println("Flask Test Failed!");
        } else {
          Serial.println("Flask Test Success!");
          client.print("GET " + uri + arguments[0] + serialNumber +
                        arguments[1] + temp +
                        arguments[2] + hum +
                        " HTTP/1.1\r\n" +
                        "Host: " + hostname + "\r\n" +
                        "Connection: close\r\n" +
                        "\r\n");
          delay(500);

        }

        client.stop();
        Serial.println();
        Serial.println("Connection closed");

      } else {
        Serial.println("temp or hum not changed");
        RGB_color(255,255,0);
      }
      next = now + 600000;
    } else {
      delay(1000);
    }
  }

}

这是不应该记录的数据示例，因为它们不遵循我的 if 语句逻辑(顶部的数字是时间戳):

Answer 1

不确定这一行是否会产生预期的结果:

while (temp1 == NAN || hum1 == NAN)

由于 NAN == NAN 应该始终返回 false，条件始终为 false 并且永远不会进入循环，这意味着您可以或不可以从第一次测量尝试中获得一致的值(在 while 之前)。

尝试

while (isnan(temp1) || isnan(hum1))