ESP8266 Community Forum

- Thu May 11, 2017 5:48 am #65828 hello, i have an arduino sketch that i can use to control relays connected to my nodemcu using the blynk app.

i'm just wondering how i can attach a reed sensor to the nodemcu and monitor its status in the blynk app?

here's the sketch:

Code: Select all#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <SimpleTimer.h>
#include <dht11.h>
dht11 DHT;
#define DHT11_PIN 12

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "********";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "********";
char pass[] = "********";

SimpleTimer timer;

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(192,168,1,166), 8442);

  // Setup a function to be called every second
  timer.setInterval(1000L, sendUptime);
}

void sendUptime()
{
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(10, DHT.temperature); //virtual pin
  Blynk.virtualWrite(11, DHT.humidity); // virtual pin
}

void loop()
{
  Blynk.run();
    timer.run(); // Initiates SimpleTimer
  int chk;
  chk = DHT.read(DHT11_PIN);    // READ DATA
  // You can inject your own code or combine it with other sketches.
  // Check other examples on how to communicate with Blynk. Remember
// to avoid delay() function!
}