Thanks for reply. I tried next 2 USB ports, but without changes. Maybe there is no problem with ESP but with my computer. I will try repeat process with Linux.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Try another USB port. It might be that the port your using can't supply enough power and the chip is browning out.