我打算用NodeMCU接上DHT22溫溼度感測器、土壤濕度傳感器、5V的繼電器控制水泵開關，然後把資料用無線網路的方式傳到樹梅派資料庫，可是不曉得是NodeMCU效能不夠還是程式問題出現了一個狀況，就是執行預計每隔5,6秒出來的功能是正常的，可是有時候會變成卡個十幾二十秒沒運作(不知道是不是跑不動，好像有可能是資料遺失沒傳送而導致跳過幾筆資料)，我是用Arduino IDE開發，接線使用杜邦線

請問有可能是哪裡出問題導致有時候會有延遲?
還有有時候DHT22回傳的值會怪怪的例如：溫度12度可是濕度會有3000度可能會是甚麼問題?

NodeMCU程式碼

#include <ESP8266WiFi.h>
#include <DHT.h>  
#define DHTPIN D1  //DHT22感測器 D1
#define soilPin A0 //土壤溼度感測器A0
#define motornow D4 //馬達
#define HOST "192.168.0.16"
const char* ssid = "myssid";
const char* password = "mypassword";
String Motor;
int soilValue;//存儲中間值
int soilMoisture;//定義土壤濕度

DHT dht(DHTPIN, DHT22);
void setup() {
  Serial.begin(115200);
  delay(10);
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
}
  Serial.println("");
  Serial.println("WiFi connected");
  // Print the IP address
  Serial.print("Your NodeMCU IP is : ");
  Serial.print(WiFi.localIP());
}
void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  while (isnan(h)){
    yield();
    h = dht.readTemperature();
    //return;
  }
  while (isnan(t)){
    yield();
    t = dht.readTemperature();
    //return;
  }
  soilValue = analogRead(soilPin); //讀取土壤感測器上的電壓值
  soilMoisture = map(soilValue,0,1023,100,0);//把電壓值按照[0,1023]映射到[100,0]
  
  Serial.println("-------------------");
  Serial.print("溫度:");
  Serial.println(t);
  Serial.print("濕度:");
  Serial.println(h);
  Serial.print("土壤濕度: ");
  Serial.print(soilMoisture);
  Serial.println("%");

  if (soilValue > 500) {    //抽水馬達控制
    digitalWrite(motornow, LOW);
    Motor ="on";
    Serial.println("Relay is turned on.");
    } else {
    digitalWrite(motornow, HIGH);
    Motor ="off";
    Serial.println("Relay is turned off.");
    }
  
  delay(1000);
  WiFiClient client;
  while(!client.connect(HOST,80)) {
  Serial.println("connection failed");
  Serial.println("wait 5 sec...");
  delay(1000);
}
  String dbserver = HOST;
  String getStr = "GET /AddData.php?";
  getStr +="Temp=";
  getStr += String(t);
  getStr +="&Humidity=";
  getStr += String(h);
  getStr +="&Soilhumidity=";
  getStr += String(soilMoisture);
  getStr +="Motor=";
  getStr += String(Motor);
  getStr += " HTTP/1.1\r\n";
  getStr += "Host: " + String(dbserver) \
  + "\r\n"+ "Connection: close\r\n\r\n";
  client.print(getStr);
  delay(10);
  client.stop();
  delay(5000);
}