My projects now cannot connect to the Blynk cloud

Solved
21

Not clear what do You mean.

22

Maybe blocked 8442?

1 Like
23

How I can check this?

24

You may try:

#define BLYNK_DEFAULT_PORT 80

25

If I correct understand I should do such steps:
1.#define BLYNK_DEFAULT_PORT 80
2.Blynk.config(auth, “blynk-cloud.com”, 80);
Is it correct?

26

Make sure your sketch starts like this

#define BLYNK_PRINT Serial 
#define BLYNK_DEBUG

#define BLYNK_DEFAULT_PORT 80

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DNSServer.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
...

Also you can try an online port checker… (blocked port…can’t believe I forgot that… haven’t used Cloud Server in forever :blush: )

27

You actually don’t need config for default settings.

28

@Gunner I think order does matter and #define BLYNK_DEFAULT_PORT 80 should go after libraries. However, I may be wrong here :slight_smile:.

29

You mean he can use this…

Blynk.config(auth);

Not that he doesn’t need the command Blynk.config(auth); at all… right? :wink:

30

He doesn’t. https://github.com/blynkkk/blynk-library/blob/master/examples/Boards_WiFi/ESP8266_Standalone/ESP8266_Standalone.ino

31

But that assume using Blynk.begin() this OP is using a separate WiFi connection, followed by Blynk.config()

1 Like
33

Actually it should go before the libraries.

1 Like
34

I wasn’t aware the order of that particular port define mattered, I just chucked it in there after seeing it suggested… I wasn’t even aware of it’s availability, as I use Local Server all the time :wink:

However, I was purposely putting the #define BLYNK_PRINT Serial and #define BLYNK_DEBUG at the beginning, as dictated in the Docs.

35

There is rezult of checking of port 8442 with using service http://canyouseeme.org:

Error: I could not see your service on 31.131.117.173 on port (8442)
Reason: Connection timed out

Your IP:
31.131.117.173
Port to Check: 8442

36

This doesn’t give you any valuable information. Port 8442 is blocked in-bound by your router as expected. This has nothing to do with connecting to Blynk.

Just to make sure we are all on the same page - you have esp8266 connecting to “klg” wi-fi network and you have your phone or computer connected to the same wireless network and from that secondary device you are able to ping blynk-cloud.com? Is this the case?

Can you put in you code, just before Blynk.config(auth) the following:

IPAddress BlynkServerIP;
WiFi.hostByName("blynk-cloud.com", BlynkServerIP);
Serial.println(BlynkServerIP);

this way we are going to see what IP address you are trying to connect to…and, please comment all your libraries except <ESP8266WiFi.h> and <BlynkSimpleEsp8266.h>

37

Thanks bilbobg, I will try this now and then I message rezult.
In addition I did ping of blynk-cloud,com from my both computers: the first is connected to the router via cable, the second via WiFi. Ping on both computers is OK.

38

If I may…
There is a tool I’m using to test connections on different ports. Recently I’ve been using it with blynk cloud too.

It is called Hercules setup utility with its build-in TCP client.
Look at screenshot.
The Blynk server will disconnect after some 10 seconds as it times out waiting for something (an auth token?)

2018-02-12
2018-02-12.png647×567 39.6 KB

2 Likes
39

I have been put in my code:

IPAddress BlynkServerIP;
WiFi.hostByName(“blynk-cloud.com”, BlynkServerIP);
Serial.println(BlynkServerIP);

and now got in console:

Connecting to klg
[48478] Connecting to klg
[49480] Connected to WiFi
[49481] IP: 192.168.1.228

WiFi connected
Connecting to Blynk cloud
0.0.0.0
[63349] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v0.5.0 on ESP8266

[63377] Connecting to blynk-cloud.com:8442
Blynk.connect() = 0
[77373] Connecting to blynk-cloud.com:8442
LED on V1: on
[91372] Connecting to blynk-cloud.com:8442
LED on V1: off
[105446] Connecting to blynk-cloud.com:8442
40

for some reason your ESP8266 can’t resolve the IP addr of the Blynk server. Can you do the following for me:

replace the 3 lines of code I asked you to put before Blynk.config with:

IPAddress BlynkServerIP(139, 59, 206, 133);

and modify your Blynk.config(auth) to Blynk.config(auth, BlynkServerIP, 8442);

41

I did:

void setup()
{
  // Debug console
  Serial.begin(9600);
  // Connecting to WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  Blynk.connectWiFi(ssid, pass); //WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("Connecting to Blynk cloud");

IPAddress BlynkServerIP(139, 59, 206, 133);
//  Blynk.config(auth);
Blynk.config(auth, BlynkServerIP, 8443);
  Blynk.connect();
  Serial.print("Blynk.connect() = "); Serial.println(Blynk.connected());

  timer.setInterval(1000L, blinkLedWidget);
}

[64708] Connected to WiFi
[64708] IP: 192.168.1.228

WiFi connected
Connecting to Blynk cloud
[64708] 
    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v0.5.0 on ESP8266

[64828] Connecting to 139.59.206.133
[64926] <[02|00|01|00] fe31f9320b444c29b3fcee2f37915dc1
[64989] >[15|03|01|00|02]
[64989] >[02]F
[64989] Invalid header type: 21
[69977] Connecting to 139.59.206.133
[70022] <[02|00|01|00] fe31f9320b444c29b3fcee2f37915dc1
[70067] >[15|03|01|00|02]
[70067] >[02]F
[70067] Invalid header type: 21
Blynk.connect() = 0
LED on V1: on
LED on V1: off
LED on V1: on
LED on V1: off
[75067] Connecting to 139.59.206.133
[75112] <[02|00|01|00] fe31f9320b444c29b3fcee2f37915dc1
[75159] >[15|03|01|00|02]
[75159] >[02]F
[75159] Invalid header type: 21