connecting NodeMCU via USB to PC causes erratic mouse movements

[ringooelbereth]

Basic Infos

The NodeMCU was working fine. I might have killed it by shorting INPUT_PULLUP pins to ground and applying 5V to INPUT pins.

Is it even possible that a damaged NodeMCU will cause mouse movements on a desktop PC?
When connecting it, it shows as a CH340 device on COM6 in the device manager (as before).

Hardware

Hardware: ?ESP-12f?
Core Version: ?2.1.0-rc2?

NodeMCU Lolin V3 (ESP8266MOD)

Description

When I connect my NodeMCU via USB cable to my windows 10 PC, my mouse starts moving wildly and buttons are clicked. I tried to observe the behaviour more closely but it is moving files on my desktop, opening them, starting programs, etc. so I had to unplug it quickly. It looks like the mouse is only moving right and down and there is a pattern in the movements and clicks.

This started with a frozen Arduino IDE. Shortly before this incident, I wrote a program that would receive input on two pins and had four interrupts to the raising and falling flanks of each io. The voltage that was applied was possibly 5V from a SDS011, I did not check because I read that the ESP8266 is 5V resistant.

The board was working before. This started after the Arduino IDE was frozen for a while and crashed when I was running my program for a while.

Settings in IDE

Module: NodeMCU 1.0 (ESP-12E Module)
Flash Size: 4M 3M SPIFFS
CPU Frequency: 80Mhz
Flash Mode: ?qio?
Flash Frequency: ?40Mhz?
Upload Using: ?OTA / SERIAL?
Reset Method: ?ck / nodemcu?

Programmer: AVRISP mkll

Sketch

//code deleted

Debug Messages

.....

not relevant

this message was flooding the console because obviously there is no delay in the loop()

[dragondaud]

Your issue has nothing to do with ESP8266 Arduino, and is a hardware issue more appropriate for other websites, not this project's Issue board. Try http://www.esp8266.com/ for general assistance. That said, Windows has been known to recognize any activity on a serial port as a mouse, because people used to use serial mice. You can disable this behavior with the following command from an admin cmd window:
REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\sermouse" /V Start /T REG_DWORD /F /D 4
Then reboot.

[devyte]

It's also possible that you have a virus, or a driver issue.
Closing.

[lrmoreno007]

I solved that problem by installing updated drivers. But it happened to me in an ESP32 with chip CP2102.

[kapollo]

Should google send a lost soul here, I just had the same problem @dragondaud was right I overflowed the serial and couldn't do anything until I disabled the serial mouse in windows (10 x64) including reflashing.
cheers

[gmdimitriz]

i got the same issue. its not a virus. the problem stops if i press "reset" button of the esp8266. also note when i plug it, windows recognizes it as a "Mouse Serial BallPoint" in Device Manager, just disabled it and the problem stops