@PeteKnight i read this document and do the same for your information i upload all the screenshot and code also.
/*************************************************************
This example shows how value can be pushed from Arduino to
the Blynk App.
WARNING :
For this example you'll need Adafruit DHT sensor libraries:
https://github.com/adafruit/Adafruit_Sensor
https://github.com/adafruit/DHT-sensor-library
App project setup:
Value Display widget attached to V5
Value Display widget attached to V6
*************************************************************/
// Template ID, Device Name and Auth Token are provided by the Blynk.Cloud
// See the Device Info tab, or Template settings
#define BLYNK_TEMPLATE_ID "TMPL4XpRnyNf"
#define BLYNK_DEVICE_NAME "UNO"
#define BLYNK_AUTH_TOKEN "UiHKjxTx1NBUtka0Tfa_X_phLxu0MMOq"
// Comment this out to disable prints and save space
#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
#include <DHT.h>
char auth[] = BLYNK_AUTH_TOKEN;
#define W5100_CS 10
#define SDCARD_CS 4
#define DHTPIN 2 // What digital pin we're connected to
// 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, h);
Blynk.virtualWrite(V6, t);
if(t>15)
{
Blynk.logEvent("temp");
// Also, you can add a custom description:
Blynk.logEvent("temp", String("Temperature above threshold: ") + t);
Blynk.email("nomanjameel26@gmail.com", "Subject", "My Blynk project is online.");
}
}
void setup()
{
// Debug console
Serial.begin(115200);
pinMode(SDCARD_CS, OUTPUT);
digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card
Blynk.begin(auth);
// You can also specify server:
//Blynk.begin(auth, "blynk.cloud", 80);
//Blynk.begin(auth, IPAddress(192,168,1,100), 8080);
dht.begin();
// Setup a function to be called every second
timer.setInterval(1000L, sendSensor);
}
void loop()
{
Blynk.run();
timer.run();
}
