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Arduino: 1.8.10 (Windows 10), Board: "NodeMCU 0.9 (ESP-12 Module), 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA:~1019KB), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

Executable segment sizes:

IROM   : 246656          - code in flash         (default or ICACHE_FLASH_ATTR) 

IRAM   : 27948   / 32768 - code in IRAM          (ICACHE_RAM_ATTR, ISRs...) 

DATA   : 1292  )         - initialized variables (global, static) in RAM/HEAP 

RODATA : 2220  ) / 81920 - constants             (global, static) in RAM/HEAP 

BSS    : 25552 )         - zeroed variables      (global, static) in RAM/HEAP 

Sketch uses 278116 bytes (26%) of program storage space. Maximum is 1044464 bytes.

Global variables use 29064 bytes (35%) of dynamic memory, leaving 52856 bytes for local variables. Maximum is 81920 bytes.

esptool.py v2.8

Serial port COM4

Traceback (most recent call last):

  File "C:\Users\JXK-V5\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.6.3/tools/upload.py", line 65, in <module>

    esptool.main(cmdline)

  File "C:/Users/JXK-V5/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.3/tools/esptool\esptool.py", line 2889, in main

    esp = chip_class(each_port, initial_baud, args.trace)

  File "C:/Users/JXK-V5/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.3/tools/esptool\esptool.py", line 237, in __init__

    self._port = serial.serial_for_url(port)

  File "C:/Users/JXK-V5/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.3/tools/pyserial\serial\__init__.py", line 88, in serial_for_url

    instance.open()

  File "C:/Users/JXK-V5/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.6.3/tools/pyserial\serial\serialwin32.py", line 62, in open

    raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))

serial.serialutil.SerialException: could not open port 'COM4': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)

serial.serialutil.SerialException: could not open port 'COM4': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2)

This report would have more information with

"Show verbose output during compilation"

option enabled in File -> Preferences.

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