Arduino: 1.8.13 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), no dtr (aka ck), 26 MHz, 40MHz, DOUT (compatible), 1MB (FS:64KB OTA:~470KB), 1, nonos-sdk 2.2.1+100 (190703), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

Executable segment sizes:

IROM   : 242452          - code in flash         (default or ICACHE_FLASH_ATTR) 

IRAM   : 26816   / 32768 - code in IRAM          (ICACHE_RAM_ATTR, ISRs...) 

DATA   : 1260  )         - initialized variables (global, static) in RAM/HEAP 

RODATA : 1092  ) / 81920 - constants             (global, static) in RAM/HEAP 

BSS    : 24960 )         - zeroed variables      (global, static) in RAM/HEAP 

Sketch uses 271620 bytes (28%) of program storage space. Maximum is 958448 bytes.

Global variables use 27312 bytes (33%) of dynamic memory, leaving 54608 bytes for local variables. Maximum is 81920 bytes.

esptool.py v2.8

Serial port COM3

Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last):

  File "C:\Users\SHLOK\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4/tools/upload.py", line 65, in <module>

    esptool.main(cmdline)

  File "C:/Users/SHLOK/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool\esptool.py", line 2890, in main

    esp.connect(args.before)

  File "C:/Users/SHLOK/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool\esptool.py", line 483, in connect

    raise FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error))

esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

_

the selected serial port _

 does not exist or your board is not connected

This report would have more information with

"Show verbose output during compilation"

option enabled in File -> Preferences.