Hello, I’m getting this failed to read from DHT sensor. I already checked the pin as D3 is V0 and I also tried D4 which is V2. I’m using NodeMCU. I already refer the similar problem but most of them are the wiring problems. I also already referred to the Dht datasheet to make sure im pining the correct pin (GND> - and 3.3V > Vcc also D3> S)
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>
char auth[] = "URHaTHZ_E1ufJj4Qc_vT4K8aumNlXCdF"; //Enter the Auth code which was send by Blink
char ssid[] = "Bilik Gerakan"; //Enter your WIFI Name
char pass[] = "smkbg@123"; //Enter your WIFI Password
#define DHTPIN 0 // D3
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22, AM2302, AM2321
//#define DHTTYPE DHT21 // DHT 21, AM2301
DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;
// This function sends Arduino's up time every second to Virtual Pin (5).
// In the app, Widget's reading frequency should be set to PUSH. This means
// that you define how often to send data to Blynk App.
void sendSensor()
{
float h = dht.readHumidity();
float t = dht.readTemperature(); // or dht.readTemperature(true) for Fahrenheit
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// You can send any value at any time.
// Please don't send more that 10 values per second.
Blynk.virtualWrite(V5, t);
Blynk.virtualWrite(V6, h);
}
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
// You can also specify server:
//Blynk.begin(auth, ssid, pass, "blynk-cloud.com", 8442);
//Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8442);
dht.begin();
// Setup a function to be called every second
timer.setInterval(1000L, sendSensor);
}
void loop()
{
Blynk.run();
timer.run();
}
