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I'm new to all this IOT thing. I just received a NodeMCU V3. I tried to plug it into my pc using the usb port, but when I do this, every usb devices disconnect from Windows (Keyboard, mouse, etc.). They connect back when I disconnect the NodeMCU. I downloaded the CH340G driver and it still doesn't work.

I tried to connect it with USB to Serial converter, but it still doesn't work, either on 3.3V or 5V. I have a 5V and 3.3V volt output on my USB to serial device. The only difference is that using 5V (Vin), my USB to Serial doesn't power on, but with the 3.3V pin it does. But still, I can't see the NodeMCU in the device manager, only the usb to serial device.

I did not soldered anything to the board and nothing is plugged in. Nothing is getting hot and I'm not sure if it is supposed to have some led ont the board to light up, but nothing happen

Am I missing something or my device is defect?

Thanks for your help.

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  • Well, I'll think about it and maybe have more questions later. Hopefully others will ask some in the meantime. You can always include good pictures of it. I dunno whether or not there will be anything useful in them, but maybe something will be spotted. – timemage May 3 at 0:32
  • something is wrong with your PC ... a shorted USB port should simply shut down that port, not everything else – jsotola May 3 at 1:39
  • @jsotola, Fixed a PC some years ago where they'd mangled one of the builtin USB ports, shorting the shield to VBUS, and it rendered all the ports on the same root hub inoperative. Until the fault was cleared that is. – timemage May 3 at 2:04
  • I just tried on another computer. I had a message from Windows that the device needed more power than the usb port could supply and the PC shut down. I tried again after the PC booted on an other port and the PC shutdown again. – tolrahC May 3 at 22:11
  • Yeah, that was what motivated all of the questions about soldering headers and so on. What you're describing is normal, so far as I remember, for a shorted device in Windows. It's also the reason for the prodding to "include good pictures of it." Since, look at those is about all that can be done from anywhere other than where you are. The rest is just suggesting specific places for you to drop your meter or scope probes. – timemage May 4 at 0:13

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