Problem: wasn't online yet

MAZIN2020 · November 27, 2019, 7:07am

Hi All,
I’m a new member here. I need help to online my application. my application wasn’t online yet
I used NodeMCU ESP 8266 and code as:
#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "zviMJ7vZ8oC1yyHFjzQh_Zsapq6Nv1MV";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "HUAWEI-E5330-5CE8";
char pass[] = "eg871rr4";

void setup()
{
  // Debug console
  Serial.begin(9600);

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

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

PeteKnight · November 27, 2019, 7:43am

@MAZIN2020 please edit your post, using the pencil icon at the bottom of the post, and add triple backticks at the beginning and end of your code so that it displays correctly.
Triple backticks look like this:
```

Pete.

MAZIN2020 · November 27, 2019, 8:07am

thank you, Mr. Pete,
please, after that what I do?

PeteKnight · November 27, 2019, 8:27am

What does your serial monitor say?

Pete.

MAZIN2020 · November 27, 2019, 8:47am

i’m used ESPlorer.

PeteKnight · November 27, 2019, 9:14am

Can’t help with that I’m afraid.

But you didn’t answer this question:

Pete.

MAZIN2020 · November 27, 2019, 9:46am

MAZIN2020 · November 27, 2019, 9:55am

PeteKnight · November 27, 2019, 10:20am

I have no idea what these screenshots are supposed to be showing.
I’d suggest that you install the latest version of the Arduino IDE, Blynk libraries and ESP core.

When you finally figure-out what a serial monitor is then copy and paste the results (with triple backticks at the beginning and end) rather than using screenshots.

Pete.

MAZIN2020 · November 27, 2019, 11:32am

MAZIN2020 · November 27, 2019, 12:11pm



#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "zviMJ7vZ8oC1yyHFjzQh_Zsapq6Nv1MV";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "HUAWEI-E5330-5CE8";
char pass[] = "eg871rr4";

void notifyOnButtonPress()
{
  // Invert state, since button is "Active LOW"
  int isButtonPressed = !digitalRead(2);
  if (isButtonPressed) {
    Serial.println("Button is pressed.");

    // Note:
    //   We allow 1 notification per 15 seconds for now.
    Blynk.notify("Yaaay... button is pressed!");
  }
}

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", 80);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);

  // Setup notification button on pin 2
  pinMode(2, INPUT_PULLUP);
  // Attach pin 2 interrupt to our handler
  attachInterrupt(digitalPinToInterrupt(2), notifyOnButtonPress, CHANGE);
}

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

PeteKnight · November 27, 2019, 12:13pm

Randomly posting screenshots and code without any commentary isn’t going to get you much help.

Try rebooting your PC and recompiling the code for the NodeMCU board and report back (in words, not pictures, what happens.

Pete.

MAZIN2020 · November 27, 2019, 4:28pm

hello all,
i’m used nodemcu esp 8266 and LED light . i connected LED to D7.

my problem, The NodeMCU is not connecting to my wifi router and show for my hard resetting via RTS pin

  Download latest Blynk library here:
    https://github.com/blynkkk/blynk-library/releases/latest

  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
    Follow us:                  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 runs directly on ESP8266 chip.

  Note: This requires ESP8266 support package:
    https://github.com/esp8266/Arduino

  Please be sure to select the right ESP8266 module
  in the Tools -> Board menu!

  Change WiFi ssid, pass, and Blynk auth token to run :)
  Feel free to apply it to any other example. It's simple!
 *************************************************************/

/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial


#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "zviMJ7vZ8oC1yyHFjzQh_Zsapq6Nv1MV";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "HUAWEI-E5330-5CE8";
char pass[] = "eg871rr4";

void setup()
{
  // Debug console
  Serial.begin(115200);

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

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

---------------------------------------------------------------------------------------------------------------------------

Executable segment sizes:


IROM   : 247340          - code in flash         (default or ICACHE_FLASH_ATTR) 


IRAM   : 27736   / 32768 - code in IRAM          (ICACHE_RAM_ATTR, ISRs...) 


DATA   : 1308  )         - initialized variables (global, static) in RAM/HEAP 


RODATA : 3068  ) / 81920 - constants             (global, static) in RAM/HEAP 


BSS    : 25560 )         - zeroed variables      (global, static) in RAM/HEAP 


Sketch uses 279452 bytes (26%) of program storage space. Maximum is 1044464 bytes.
Global variables use 29936 bytes (36%) of dynamic memory, leaving 51984 bytes for local variables. Maximum is 81920 bytes.
esptool.py v2.8
Serial port COM7
Connecting....
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: bc:dd:c2:30:a3:4b
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 283600 bytes to 205209...

Writing at 0x00000000... (7 %)
Writing at 0x00004000... (15 %)
Writing at 0x00008000... (23 %)
Writing at 0x0000c000... (30 %)
Writing at 0x00010000... (38 %)
Writing at 0x00014000... (46 %)
Writing at 0x00018000... (53 %)
Writing at 0x0001c000... (61 %)
Writing at 0x00020000... (69 %)
Writing at 0x00024000... (76 %)
Writing at 0x00028000... (84 %)
Writing at 0x0002c000... (92 %)
Writing at 0x00030000... (100 %)
Wrote 283600 bytes (205209 compressed) at 0x00000000 in 18.5 seconds (effective 122.4 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

PeteKnight · November 27, 2019, 5:42pm

Please don’t keep creating new topics about what is effectively the same issue.
I’ve merged both topics together.

This isn’t an error message, it’s what happens every time you upload new code - the MCU reboots itself.

This icon in the top right hand corner of the IDE is how you open the serial monitor…

Once you’ve set th serial monitor to the correct baud rate you’ll get lots off useful information, which you can copy using CTRL - C

Pete.

MAZIN2020 · November 27, 2019, 6:06pm

i selected 9600 baud in serial monitor, but nothing shown in serial monitor…
and not connecting to application

PeteKnight · November 27, 2019, 7:51pm

The best baud rate to use for your serial debugging is the native speed of the board. This will be either 74880 or 115200.

Choosing one of these speeds will show the board’s boot message when you press the reset button on the board.
Once you’ve established the native baud rate then change your serial.begin statement to the same rate and re-upload the code.

You’ll then be able to see both the board’s messages and the debug messages in the same serial monitor screen.

Pete.

MAZIN2020 · November 28, 2019, 4:35am

i selected speed for both 115200, shown in serial monitor
‘’’{⸮⸮⸮b⸮$܂⸮d⸮p⸮l⸮rl⸮⸮n⸮⸮B$`{⸮ndph[63] Connecting to HUAWEI-E5330-5CE8
‘’’
but unconnect to application.

PeteKnight · November 28, 2019, 4:47am

So the unreadable characters at the beginning are your board’s boot message, but they don’t make sense because you’re using the wrong baud rate. Try 74880 instead, as I explained earlier.

If this is the full message that you’re getting then it seems that you aren’t managing to connect to your Wi-Fi.
SSID and password are both case sensitive and the NodeMCU only operates on the 2.4GHz band.

Pete.

MAZIN2020 · November 28, 2019, 5:43am

i tried different speed, no benefit…
my wifi is 802.11n on 2.4 GHZ

PeteKnight · November 28, 2019, 6:45am

Keep changing serial monitor speeds (you don’t need to ch age the code until you find the correct speed) and press the reset button on the board. When you have the correct speed you’ll see the boot message from the board, instead of:

Once you have the speed that shows this in plain English then change the code to match that speed.

Pete.