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Cannot connect to the cloud: "Device wasn't online yet"

#1

Hi :wave: ,

I am using an Arduino Mega with an ESP8266 module, that I try to connect with Blynk through Wi-Fi.
But I encounter the following problem: on the Blynk app it shows “Device wasn’t online yet”, I suspect that it’s due to the fact that my ESP8266 cannot establish a connection with the Blynk Cloud. In fact, when I run the example code, the ESP doesn’t seem to ping with the server.

I have done a lot of research but none seems to lead me anywhere. Does anyone have an idea ?

#define BLYNK_PRINT Serial  
#include <ESP8266_Lib.h>
#include <BlynkSimpleShieldEsp8266.h>
// Set ESP8266 Serial object
#define EspSerial Serial1
ESP8266 wifi(&EspSerial);
char auth[] = "I0oxxxxxxxxxxxxxx0cUJCW7iB6B";
void setup()
{
    Serial.begin(9600);  // Set console baud rate
    delay(10);
    EspSerial.begin(9600);  // Set ESP8266 baud rate
    delay(10);
    Blynk.begin(auth, wifi, "Macha","txxxxxxxxg");
}
void loop()
{
    Blynk.run();
}

Blockquote
RX1 (Arduino) --> TX (ESP)
TX1(Arduino) -->TX(ESP)
GND (Arduino) --> GND (ESP)
3,3 V (Arduino) --> 3,3V & EN (ESP)

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#2

With the mega and an esp8266-01 at best you should use a capacitor to handle the extra power consumption. Better yet a separate power supply with the grounds connected. Also try refreshing the auth code.

NOTE please use triple backticks for posting code. They are sometimes hard to find.

#3

Thank you for your response,

So the only possible issue here is power? If so, how much does the ESP actually need, and can I power it with AA batteries?

#4

No, it could also be your ISP blocking port 80, incorrect wiring (easy with the ESP-01), incorrect Auth code, your router needing a reboot etc etc.

Take a look at the specs for whichever ESP module you are using (something you haven’t shared).

Not really!

Pete.

#5

Hi Pete, thank you for your answer,
I have changed the auth a few times, it seems to me that it isn’t the problem, I’ll try again though. About the wiring I don’t think that something is wrong with it either. Can you please elaborate on the “ISP blocking port 80”. :slight_smile:

#6

Yes, when you edit your original post and replace the blockquotes with triple backticks at the beginning and end of the code.
Triple backticks look like this:
```

Pete.

#7

It’s done

#8

Change this to:

Blynk.begin(auth, wifi, "Macha","txxxxxxxxg"), "blynk-cloud.com", 8080);

This will force the connection to use port 8080 instead of 80 as your ISP may block traffic on port 80.

Pete.

#9

I still get the same results, any other ideas?

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#10

So you’ve addressed the power issue, rebooted your router, triple-checked your wiring etc?

Pete.

#11

Wi-Fi reboot & Wiring triple-check done. Do you have any ideas on how can I address the power issue ? It’s an ESP-01

#12

A 3.3v 1amp power supply, with the negative rail connected to the GND pin on your Arduino.

Or, you could save yourself a lot of hassle, and give yourself additional functionality including OTA updates, by choosing a better hardware platform…

Pete.