Sending Data from Arduino Mega to Blynk

Need Help With My Project
1

Hello Community.

I hava a Problem.
I want to send the Data from a DHT22 to Blynk over a ESP8266-01.
The connection is working and the reading of the DHT22 too.
But when i open Blynk on my Android there are not the Data from the DHT22.

/**************************************************************
 * Blynk is a platform with iOS and Android apps to control
 * Arduino, Raspberry Pi and the likes over the Internet.
 * You can easily build graphic interfaces for all your
 * projects by simply dragging and dropping widgets.
 *
 *   Downloads, docs, tutorials: http://www.blynk.cc
 *   Sketch generator:           http://examples.blynk.cc
 *   Blynk community:            http://community.blynk.cc
 *   Social networks:            http://www.fb.com/blynkapp
 *                               http://twitter.com/blynk_app
 *
 * Blynk library is licensed under MIT license
 * This example code is in public domain.
 *
 **************************************************************
 *
 * This example shows how to use ESP8266 Shield (with AT commands)
 * to connect your project to Blynk.
 *
 * WARNING!
 *   It's rather tricky to get it working, please read this article:
 *   https://github.com/blynkkk/blynk-library/wiki/ESP8266-with-AT-firmware
 *
 * Change WiFi ssid, pass, and Blynk auth token to run :)
 * Feel free to apply it to any other example. It's simple!
 *
 **************************************************************/

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>
#include <DHT.h>
#include <SimpleTimer.h>


#define DHT1PIN 53                                  //Pinbelegung DHT1
#define DHT1TYPE DHT22    
  
// Instantiates and initializes the dht object
DHT dht1(DHT1PIN, DHT1TYPE);                        //Initialisieren DHT1  

SimpleTimer timer;

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

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

// Hardware Serial on Mega, Leonardo, Micro...
#define EspSerial Serial1

// or Software Serial on Uno, Nano...
//#include <SoftwareSerial.h>
//SoftwareSerial EspSerial(2, 3); // RX, TX

// Your ESP8266 baud rate:
#define ESP8266_BAUD 115200

ESP8266 wifi(&EspSerial);

void sendSensor()
{
  float h1 = dht1.readHumidity();
  float t1 = dht1.readTemperature(); // or dht.readTemperature(true) for Fahrenheit

  if (isnan(h1) || isnan(t1)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  Serial.println("Temperature: "+String(t1));
  
  // You can send any value at any time.
  // Please don't send more that 10 values per second.
  Blynk.virtualWrite(V1, h1);
  Blynk.virtualWrite(V2, t1);
}

void setup()
{
  // Set console baud rate
  Serial.begin(9600);
  delay(10);
  // Set ESP8266 baud rate
  EspSerial.begin(ESP8266_BAUD);
  delay(10);

  Blynk.begin(auth, wifi, ssid, pass);

  dht1.begin();
  
  timer.setInterval(10000L, sendSensor);
}

void loop()
{
  Blynk.run();
  timer.run();
}

Here is the Serial Print.

[19]
___ __ __
/ _ )/ /_ _____ / /__
/ _ / / // / _ / '/
///_, /////_
/__/ v0.4.6 on Arduino Mega

[604] Connecting to UPC246454487
[3639] AT version:1.3.0.0(Jul 14 2016 18:54:01)
SDK version:2.0.0(656edbf)
compile time:Jul 19 2016 18:44:44
OK
[4702] Failed to enable MUX
[9734] +CIFSR:STAIP,“192.168.192.3”
+CIFSR:STAMAC,“5c:cf:7f:a5:5e:80”
[9742] Connected to WiFi
[19902] Ready (ping: 11ms).
Temperature: 19.50
Temperature: 19.50

What is wrong? Do i have a problem in my Code?

Thank you.

2

not a 100% certain but I think the code after that 'return’will not run, so try removing it and see if it works.

Cheers

kev

3

Well, if your serial print is working, then so should your Blynk.virtualWrite() commands. What have you got in your app that is linked to V1 & V2 and what are the Reading Rates (PUSH or a time?)

Also, does your app show as connected to the device? If not, then that would explain… the device is connected to the server, thus running the script, but the app might not have the same auth code? Try resetting the auth in the app and replacing it in the sketch.