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Error while uploading
Title
Question
My program compiled successfully but while uploading it gives an error 
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

I am using Windows 10

Arduino Wireless-Connectivity-to-Arduino 10-11 min 0-10 sec 26-05-20, 9:31 a.m. Sumit6135880

Answers:

The error is likely to because of wrong connection.
Perform the experiment as shown in the tutorial with all the necessary changes and with the use of push button.
26-05-20, 10:59 a.m. Pratikjb11
Again error while uploading the program

raise FatalError('Invalid head of packet (0x%s)' % hexify(b))
esp tool.FatalError: Invalid head of packet (0x00)
esptool.FatalError: Invalid head of packet (0x00)
26-05-20, 12:39 p.m. Sumit6135880

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