Hello,
I am getting a fatal warning and error while uploading the Web Server example to the board.
I have set it up as “Generic ESP8266 Module”, Upload Speed of 115200. I am running Windows 10 and had not experienced this issue with other examples. I have two boards and two cables and tried all combinations with same mistake, so it is probably not hardware related. I also tried to hold the boot button while loading but that just times out.
WARNING: Detected crystal freq 13.31MHz is quite different to normalized freq 26MHz. Unsupported crystal in use?
Crystal is 26MHz
esptool.FatalError: Invalid head of packet (0x46)
Any help will be highly appreciated. Trying to finish a sub-system for school here.
Best!