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Error while uploading

My program for this tutorial is compiling properly. But its giving an error while uploading. I m using windows 10. When I start uploading as per tutorial when connecting... appears i need to click a button for 2 to 3 seconds...after pressing button its giving different errors like
1) serial.serialutil.SerialException: could not open port 'COM4': FileNotFoundError(2, 'The system cannot find the file specified.', None, 2) esptool.fatalerror: failed to connect to esp8266: timed out waiting for packet header

Arduino Wireless-Connectivity-to-Arduino 10-11 min 0-10 sec 25-05-20, 7:23 p.m.


Considering you are getting "could not open port COM4" error, I request you to watch all the changes we have done in the TOOLS option in the Arduino IDE and perform the experiment again.
25-05-20, 10:28 p.m. Pratikjb11

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