Getting Error While Code Upload - NODEMCU ESP8266

[Mugesh-Rajaram]

Hi,
While am trying to upload the code from Arduino IDE to NODEMCU ESP8266 board getting some error can anyone help me to clear this error.

Program

#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>

char ssid[] = "MUGESH";
const char* password = "87654321";

void setup() {
  Serial.begin(9600);         //Serial connection
  WiFi.begin(ssid, password);   //WiFi connection

  while (WiFi.status() != WL_CONNECTED) {  //Wait for the WiFI connection completion
    delay(500);
    Serial.println("Waiting for connection");
  }
  Serial.println("WIFI Connected with : " + WiFi.localIP());
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
    HTTPClient http;    //Declare object of class HTTPClient
    http.begin("https://jsonplaceholder.typicode.com/posts");      //Specify request destination
    http.addHeader("Content-Type", "text/plain");  //Specify content-type header
    int httpCode = http.GET();   //Send the request
    String payload = http.getString();                  //Get the response payload
    StaticJsonDocument<500> jsonDoc;
//    JsonObject& jsonObj = jsonBuffer.parseObject(payload);
    deserializeJson(jsonDoc, payload);
    serializeJsonPretty(jsonDoc, Serial);
    Serial.println(httpCode);   //Print HTTP return code
    Serial.println(payload);    //Print request response payload
    http.end();  //Close connection
  } else {
    Serial.println("Error in WiFi connection");
  }
  delay(30000);  //Send a request every 30 seconds
}

Error In Text

Sketch uses 287632 bytes (27%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27156 bytes (33%) of dynamic memory, leaving 54764 bytes for local variables. Maximum is 81920 bytes.
esptool.py v2.6
2.6
esptool.py v2.6
Serial port COM7
Connecting....
Chip is ESP8266EX
Features: WiFi
MAC: 84:0d:8e:86:3c:a9
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 291792 bytes to 210262...

Writing at 0x00000000... (7 %)Traceback (most recent call last):
  File "C:\Users\IN\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.1/tools/upload.py", line 25, in <module>
    esptool.main(fakeargs)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 2698, in main
    operation_func(esp, args)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 2158, in write_flash
    esp.flash_defl_block(block, seq, timeout=DEFAULT_TIMEOUT * ratio * 2)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 104, in inner
    return func(*args, **kwargs)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 632, in flash_defl_block
    self.ESP_FLASH_DEFL_DATA, struct.pack('<IIII', len(data), seq, 0, 0) + data, self.checksum(data), timeout=timeout)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 354, in check_command
    val, data = self.command(op, data, chk, timeout=timeout)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 322, in command
    self.write(pkt)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 285, in write
    self._port.write(buf)
  File "C:/Users/IN/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/pyserial\serial\serialwin32.py", line 323, in write
    raise writeTimeoutError
serial.serialutil.SerialTimeoutException: Write timeout
the selected serial port serial.serialutil.SerialTimeoutException: Write timeout
 does not exist or your board is not connected

Error Image

[earlephilhower]

The error message from the uploader tells you the problem:

the selected serial port does not exist or your board is not connected

Looks like a power or connectivity problem and the 8266 disconnects during upload. Try a different usb port and cable, then please use the forum www.esp8266.com if you want add'l assistance, as this is not related to the core.

[Mugesh-Rajaram]

@earlephilhower After changing the USB port and the cable also the same error persist, even i have flashed my Firmware too.

[shrakanis]

did you managed to fix it?
it happened to me too after Arduino libray update

[snow-drop]

@shrakanis Same here. This is the first time I've used Node MCU I bought last week and seems that there is no fix available yet after days of searching on the Web.

[jpradoar]

I have the same error.
but before write that I tested...
3 usb cables (all cables with data support, not only power)
3 usb ports with all cables
and then I bought a new nodemcu v3
I did same test but using arduino ide 1.8.8
I runned arduino ide and compile with my user and then with root.

but nothing has been running ok.

soft info

arduino ide version: 1.8.9
os: ubuntu 18.04.2 LTS (Bionic Beaver)
kernel: 4.18.0-20-generic

Sketch uses 257672 bytes (24%) of program storage space. Maximum is 1044464 bytes.
Global variables use 26572 bytes (32%) of dynamic memory, leaving 55348 bytes for local variables. Maximum is 81920 bytes.
Sketch uses 257672 bytes (24%) of program storage space. Maximum is 1044464 bytes.
Global variables use 26572 bytes (32%) of dynamic memory, leaving 55348 bytes for local variables. Maximum is 81920 bytes.
esptool.py v2.6
2.6
esptool.py v2.6
Serial port /dev/ttyUSB0
Connecting....
Chip is ESP8266EX
Features: WiFi
MAC: ca:ac:11:43:aa:10
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 261824 bytes to 191216...
Writing at 0x00000000... (8 %)Traceback (most recent call last):
  File "/root/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/upload.py", line 25, in 
    esptool.main(fakeargs)
  File "/root/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool/esptool.py", line 2698, in main
    operation_func(esp, args)
  File "/root/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool/esptool.py", line 2158, in write_flash
    esp.flash_defl_block(block, seq, timeout=DEFAULT_TIMEOUT * ratio * 2)
  File "/root/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool/esptool.py", line 104, in inner
    return func(*args, **kwargs)
  File "/root/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool/esptool.py", line 632, in flash_defl_block
    self.ESP_FLASH_DEFL_DATA, struct.pack('

[Mugesh-Rajaram]

Hi @shrakanis / @snow-drop
After downgrading the ESP8266 version from 2.5.2 to 2.5.1 my issue is resolved, check once the same for you people also.
#6110 (comment)

[shrakanis]

Yesterday did the same ;) thanx

[snow-drop]

@Mugesh-Rajaram Thank you very much! It worked for me too.

[jpradoar]

Thanks, that worked for me.

[jwrussert]

I think I just solved this same issue. There is text on my board saying to use a 9600 Baud. So I changed the upload speed to 9600. When I change the upload speed back to 115200 the error goes away.

[sathyasathish]

still i'm getting the same error ...i changed the baud rate , esp8266 version to 5.2.1 in board manager....Please help me to solve this error..

[denisfou]

Same errors here, version 2.5.2 of boards seems to be bugged, 2.5.1 is ok.
I have pb with ESP01 and nodemcu with 2.5.2.

The cause is esptool.py v2.6 i guess :
Bad display (no scrolls when upload is in progress)
Bad initialization : soft reset doesn't work on ESP just after download.

[sunnybera]

I think I just solved this same issue. There is text on my board saying to use a 9600 Baud. So I changed the upload speed to 9600. When I change the upload speed back to 115200 the error goes away.

This worked for me to fix serial communication issue with ESP8266 using Arduino IDE 1.8.9 on Ubuntu Release 18.04.1 LTS (Bionic Beaver) 32-bit.

[sathyasathish]

Thank you guys!!It worked for me too...when i changed the baud rate......

…

On Wed, Jul 10, 2019 at 7:15 PM SunnyB ***@***.***> wrote: I think I just solved this same issue. There is text on my board saying to use a 9600 Baud. So I changed the upload speed to 9600. When I change the upload speed back to 115200 the error goes away. This worked for me to fix serial communication issue with ESP8266 using Arduino IDE 1.8.9 on Ubuntu Release 18.04.1 LTS (Bionic Beaver) 32-bit. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#6110?email_source=notifications&email_token=AMRJZLFC3AON5ZGXOPITUPLP6XRXVA5CNFSM4HN2DOLKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODZTQDDI#issuecomment-510067085>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AMRJZLCX34HCZDMCFCBXGT3P6XRXVANCNFSM4HN2DOLA> .

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