Troubleshooting basic ESP8266 issues
There are several issues you may face when using ESP8266 boards. Here are some of the common ones and ways to solve them.
The Board is not visible from the Arduino IDE
One of the causes of this problem is a faulty USB cable. You can troubleshoot this by using another USB cable to see whether it works. If it works, then your USB cable is faulty and should be replaced. If the problem still persists, even when you are using another USB cable, the issue may be with the board definitions.
This issue can also occur when the board definitions have not been installed properly, or if they have not been installed at all. So make sure that the board definitions have been installed properly, or try and reinstall them again. ...