Unable to open com port windows 11. The COM port is usually COM3 and is set at 38400 BAUD through Device manager. Ensure seamless device communication by following these simple instructions. The problem is that the COM port does not show up in the drone's software. Jul 13, 2025 · How to Enable COM Port in Windows 11: A Comprehensive Guide In today’s digital landscape, communication between devices often hinges on the proper configuration of COM ports (Communication Ports). I also tried using PuTTY to communicate, but it also didn't work. I'm trying to use my laptop with Windows 11 to communicate with a device over my laptops COM port. Do you have any ideas as to what is causing the… Hi! I was advised to ask my question again here. The controller was working fine, but I am not sure if the problem started after a series of Windows updates. After connecting the device to my laptop it also shows up in the device manager but it seems that I'm unable to open the COM port for…. Mar 8, 2025 · Windows 11, like its predecessors, supports COM ports, but many users may not know how to enable or configure them effectively. After connecting the device to my laptop it also shows up in the device manager but it seems that I'm unable to open the COM port for communication. My laptop is up to date as far as patches are concerned. After connecting the device to my laptop it also shows up in the device manager but it seems that I'm unable to open the COM port for… Jan 21, 2026 · Quick Answer: To add a COM port in Windows 11, open Device Manager, expand “Ports (COM & LPT),” and select “Add legacy hardware. This article will guide you through the steps of enabling a COM port in Windows 11, detailing the process, troubleshooting common issues, and offering helpful tips. Causes, drivers, reassignment, and workarounds to use your serial devices without errors. Hello! I'm trying to use a CH340 RS232 to USB cable to communicate with another device through my laptops COM port. I have reinstalled the driver many times using Device Manager, followed many online help for COM port issues in Windows 11 including power settings. Here's what Intel says about this error in general (though it doesn't specifically mention COM ports): Error Code 45 on Device Manager for Intel® Bluetooth® or Learn how to check COM ports in Windows 11 with our detailed step-by-step guide. Whether you’re connecting legacy hardware, industrial equipment, or specialized peripherals, ensuring that COM ports are correctly enabled and configured in Windows 11 is essential. For this I use a CH340 RS232 to USB cable to connect the device with my laptop. It is like the port is closed. 0 I bought a laptop with Windows 11 Home, which I intend to use with my drone. Reboot your PC after updating the driver software. The drone's flight controller connects to the laptop via USB and presents as a COM port in the drone's software (Mission Planner). How to Enable COM Port in Windows 11 Windows 11 has introduced a sleek, modern interface and numerous improvements over its predecessors. Dec 24, 2025 · Windows 11 manages COM ports through Device Manager, where hardware settings can be configured and troubleshooting can be performed. Fixes when Windows 11 doesn't recognize COM ports. When I open the device… Open the Windows Device Manager (on Windows 10 & 11, right-click on the Start button and select “Device Manager”). Feb 6, 2024 · Hello! I'm trying to use a CH340 RS232 to USB cable to communicate with another device through my laptops COM port. How to Enable COM Ports in Windows 11: A Comprehensive Guide The Computer Communication Port (COM port), also known as a serial port, is a crucial interface that allows communication between your computer and external devices such as modems, industrial equipment, scientific instruments, and serial devices like Arduino and other microcontrollers. Hi! I was advised to ask my question again here. I'm running SW on a Windows 11 laptop that can not connect to an RS-232 dongle reading ASCII text GPS data at 38400 BAUD rate. ” Follow the wizard to manually install a communication port, selecting the desired COM port number. The process involves verifying hardware presence, updating drivers, and configuring port settings to match device specifications. Nov 15, 2025 · To enable COM ports on Windows 11, you typically need to ensure that the appropriate drivers are installed and that the COM ports are configured correctly in the system settings. Expand the “Ports COM & LPT” section by clicking on the small arrow next to it. Right-click on the COM port for your RS232 to USB adapter and select “Update Driver”. When I open the device… How to Enable COM Port in Windows 11: A Comprehensive Guide In today’s digital landscape, communication between devices often hinges on the proper configuration of COM ports (Communication Ports). This Windows 11, like its predecessors, supports COM ports, but many users may not know how to enable or configure them effectively. For USB-to-serial adapters, install the manufacturer’s driver first. 7jeep, wxpu, 36kdt, t4fs, ojj5x, 2x5m3, fpb0cb, iisz, vftyb, kno2d,