From 2015/10/1, NodeMCU has been upgraded to a new chip CH340CH340 chip-driven official description: WINDOWS driver USB to serial CH341 / CH340 installation packageSupport WINDOWS 98 / ME / 2000 / XP / Server 2003 / VISTA / Server 2008 / Win7 / Win8 / Win8.1 32 Bit / 64 and MACThrough Microsoft's digital signature authenticationIn the computer end of the USB device emulation as a standard serial