[Solved] ESP8266 NodeMCU/ESP32 esptool.py fatal error in Arduino IDE 2024 Updated
esptool.py fatal error arises during the upload process when the Arduino IDE's built-in flashing tool, esptool.py, fails to establish communication with your ESP board.
This can happen due to various reasons, typically related to hardware connections, software configurations, or timing issues. Probable solution are given below :
Driver Issues: Update or reinstall the USB drivers for your ESP board, especially if you're on Windows.
Port Selection: Choose the appropriate COM port your ESP board is connected to under "Tools" ,"Port." You might need to check your device manager or system settings to identify the correct port.
If the above 2 solutions are not working follow the process given below .
Flash Button: If your ESP board has a dedicated flash button, press and hold it while uploading
Reset Timing (ESP8266 Only): For ESP8266 boards, the timing of holding the reset button during upload is crucial. Try these approaches:
Hold the reset button before plugging in the USB cable, then release it a second or two after uploading starts.
Press the reset button repeatedly just before you click the upload button in the Arduino IDE.
USB Cable: Ensure you're using a good-quality data cable (not just a charging cable) that can transfer data reliably. Try a different cable if possible.
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