How to fix "SerialTimeoutException: Write timeout" error with NodeMCU and arduino ide

Question

I was trying to build a simple IoT product using a nodemcu, an LED, and the blynk app. This is the most basic thing you can do with a nodemcu. However, when I was uploading the example from the Blynk library, I was getting this error.

It seems to be a port error but I still can't comprehend any of it.

The error messages are as follows:

Arduino: 1.8.9 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Disabled, All SSL ciphers (most compatible), 4M (no SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 115200"

Sketch uses 279792 bytes (26%) of program storage space. Maximum is 1044464 bytes.
Global variables use 28848 bytes (35%) of dynamic memory, leaving 53072 bytes for local variables. Maximum is 81920 bytes.
esptool.py v2.6
2.6
esptool.py v2.6
Serial port COM3
Connecting...
Traceback (most recent call last):
  File "C:\Users\saumi\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.1/tools/upload.py", line 25, in <module>
    esptool.main(fakeargs)
  File "C:/Users/saumi/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 2653, in main
    esp.connect(args.before)
  File "C:/Users/saumi/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 460, in connect
    last_error = self._connect_attempt(mode=mode, esp32r0_delay=False)
  File "C:/Users/saumi/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 440, in _connect_attempt
    self.sync()
  File "C:/Users/saumi/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 379, in sync
    timeout=SYNC_TIMEOUT)
  File "C:/Users/saumi/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.1/tools/esptool\esptool.py", line 322, in command
    self.write(pkt)
  File "C:/Users/saumi/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/saumi/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

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

Answer 1

Change your Upload speed from 115200 to 9600! I did this, and it worked fine