Has this page been referenced?
See heading: 'My board doesn't appear as a USB . . . '
Instructions for pre Windows10
re: ''Red and Green light brightly for a fraction of a second, then they start 'pulsing''
Same link as above, see heading 'Espruino stopped working'
"If you get pulsing Red/Green LEDs, it's because . . . "
For clarification, is the intent to reflash the WiFi, or is it that the WebIDE just is not recognizing the COM port?
I have not found my case in Troubleshooting. So I'm describing the problem here.
Moreover when i Hold down the button, and then plug the board in while keeping it held, I get 'Red and Green light brightly for a fraction of a second, then they start 'pulsing', and sound signal of a connection to PC. But nothing happens on the side of IDE