請(qǐng)注意，我是 Firebase 的新手，因此它們可能是應(yīng)用程序中的內(nèi)部錯(cuò)誤。告訴我你是否發(fā)現(xiàn)了任何東西。

測(cè)試 DHT22

運(yùn)行代碼并構(gòu)建電路：

電路

?

//Code
#include "DHT.h"
#define DHTPIN 6
DHT dht;
#define DHTTYPE DHT22     //Change this to any type of DHT Sensor you're Using!
DHT(DHTPIN, DHTTYPE);
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);                               //Starts serial
delay(5000);                                      //Waits before reading from sensor
Serial.println("DHT22 Temp. And Humi. Test");     //Prints the intro
}
void loop() {
// put your main code here, to run repeatedly:
dht.read11(DHTPIN);                             //Reads from the sensor
Serial.println("Humi. ---------- ");            //Prints humidity
Serial.print(DHT.humidity);                       //Prints humidity
Serial.print("%         ");                     //Marks the humidity as %
Serial.print("Temp. ------------ ");            //Prints temperature           
Serial.print(DHT.temperature);                  //Prints temperature
Serial.print("℃");                              //Marks the temperature unit
Serial.println();
Serial.print("***********************************");
Serial.println)
delay(2000);   //fastest is onceevrey 2 seconds
}     //end loop

應(yīng)該是印刷溫度和濕度。如果不檢查 buad 率。將其更改為 9600。如果仍然不起作用，則此代碼將打印“Hello World！” evrey 第二個(gè)看看你是否有任何溝通：

//Code
void setup() {
Serial.begin(9600);
delay(5000);
}
void loop() {
Serial.println("Hello World!");
delay(1000);
}