Configuring serial port error 31 putty. If no COM port is present, or COM port shows a warning symbol, try uninstalling and reinstalling the driver. So I don't understand why it won't work. Putty won't open a connection from the “Serial” tab in the left column. I have an app that is installed on about a dozen machines (all Windows 10 64-bit but the app is 32-bit). 文章浏览阅读3. The app starts up about a minute after the machine is booted up (they are shutdown nightly) and connects to 3 separate serial devices. . First check the COM port number Step 2: Check the COM Port number: Posting the fix here in case it comes up in search for someone new as I’m fairly new to Linux coming over from Windows and use a lot of network tools. I do have a pink and white light on the CHIP, and have tried different USB cables. On several machines (but not all - arg!) one of the devices serial ports fails to open fairly consistently. Choose “Session” instead and select the checkbox for Serial. I use Putty to get into new switches or trouble shoot existing ones, via the console port. Nov 7, 2014 · If you want to prevent the permanent reassignment of the COM port you can use the advanced settings in DevMgr to set the desired port and from then on the device should stick with that port number. When it fails it gives me a LastErrorCode of 31 First Download and install PuTTY (emulator terminal software) Step 1: Attach the DV9 Female end of Console cable with the DV9 Male end of the USB to DV9 Serial Converter and then connect the RJ54 connector end of the Console cable to the Cisco router or Switch. Is it a bad cord, other hardware, or am I missing something? Dec 17, 2019 · Had this problem and found the solution. 串口 configuring serial port error 31:连接到系统上的设备没有发挥作用 原创 最新推荐文章于 2025-06-09 14:43:30 发布 · 7. Then I get "Unable to open connection to COM3 Configuring serial port: Error 31: A device attached to the system is not functioning. The error code 2, is vague as to what is wrong 2 I am using windows 7, 64bit I have a MKS gen l connected to a usb port The CH340 com port emulation driver converts USB in to a virtual com port, com 5, baudrate 115200. This guide will help you resolve the issue step by step. Jan 9, 2025 · Verify that the COM port is present and correct [COM8] in Device Manager. Jan 11, 2025 · To fix this, you need to identify the correct serial port, adjust permissions, and ensure the required drivers are in place. This problem often occurs due to missing permissions, incorrect port configurations, or driver issues. As far as I know, there's no way for the device to know when PuTTY opens the serial port; an Enter keypress would serve as a "attention" message and you should receive a reply. Any ideas on how to debug this How to Connect to USB Console by Using PuTTY?: Using PuTTY for USB console adapters allows you to easily establish a serial connection between your computer and networking devices such as routers and switches. Dec 26, 2024 · I'm following the instructions on the install page (I think) but I cannot seem to get PuTTY to connect. 2k 阅读 If PuTTY shows the error "Unable to open serial port" on Linux Mint, it means there’s a communication issue between PuTTY and the serial port device. I was initially 使用 Putty 连进行串口 UART 的监控 最近 Ryuu 老师因为客户的案子而写了这篇文章，客户那边使用了 Putty 这套软件来对我家所设计的 UART-CAN 硬件进行测试，但是客户一直没法测试成功，所以 Ryuu 老师也来协助看看是那边的问题。 Putty是什么呢？ There's a windows 10 machine on which Putty refuses to open serial ports. MobaXterm, Putty, etc, so working through some issues that I’m hoping to post fix for as they pop up for new Linux users as well. 1k次，点赞28次，收藏16次。查看端口已经识别出来，但是无法使用，考虑是驱动问题，重新卸载了串口驱动还是报这个错误。（我的设备还在安装系统，所以没有打印任何信息，但其实已经进入串口啦）报这个错我首先到设备管理器中查找com口选择是否正确。_连到系统上的设备没有 Configuring serial port: Error 31: A device attached to the system is not functioning. There's no error message, just a "ding" then I click on Open. Nov 28, 2022 · I've been using ardurino ide seriel monitor but putty seems easier to use. It's caused by any number of reasons that prevent Windows from loading the driver for the particular hardware device. When I run putty I enter serial option change com1 to com5, change baudrate to 115200. Same settings as USB port emulator. Then I click open. Aug 2, 2024 · The Code 31 error is one of several Device Manager error codes. gfpd, avwoe, cauyp, jsbsdx, oikz5, vjly, mvgv, 0ducnm, ijgab, wpeyl,