Put your FC in bootloader mode again and run ImpulseRC driver fixer, in Betaflight Configurator’s COM port, it should now show up as “STM32 BOOTLOADER” and it should allow you to flash firmware now.Now unplug the FC and reboot your computer.With your FC connected to the computer in bootloader/DFU mode, go to Device Manager, find Guillemot STM DFU Device, right click it and Uninstall it, make sure to check “uninstall driver”.To fix this you have to remove Guillemot first: When re-installing driver with Zadig or ImpluseRC driver fixer, it would show up as “STM32 BOOTLOADER” but would then it would always revert back to “Guillemot STM DFU Device”. If it’s there, congratulations you have found the problem! It’s the wrong driver.Go to Device Manager and see if you can find “ Guillemot STM DFU Device” under any Device Type, e.g.Put your FC in bootloader mode (aka DFU mode, to do this, power off the FC first by unpluging USB cable and LiPo, hold down the boot button on the FC, then plug in the USB cable).The correct DFU driver should be “ STM32 BOOTLOADER“. If you can connect to the flight controller, but unable to flash firmware and it gives you the “Failed to open serial port” error even after running the ImpulseRC driver fixer, it’s possible that you have a wrong DFU driver installed e.g. You need to enter DFU Mode for flashing firmware, see how to do it here: Once that’s completed successfully, fire up Betaflight Configurator and try to connect to or flash your flight controller and it should work. This tool will automatically search for your FC, and install whatever driver you need on your computer.Download and run ImpulseRC Driver Fixer Tool here (Warning: it’s a 3rd party software, please scan it with AV software before running it).Connect your FC to the computer via USB Cable.If that didn’t work, try running the ImpulseRC Driver Fixer. By communicating with one of the virtual ports, your app will, in fact, talk every time to the same real interface.This is perhaps the most common issue when connecting to or flashing a flight controller in Betaflight Configurator.įirst thing to try would be a different USB cable, make sure it’s a data cable, not a charging-only cable. For this, you just create a bundle of virtual COM ports that will emulate a single real one. Virtual Serial Port Driver Pro makes it possible to create complex port bundles where multiple virtual and real serial ports can exchange the incoming data with all the other ports added to the bundle at a time.Īnytime your application needs to connect to a serial port, the switcher option will link it to a COM port being currently free.
![stm32 virtual com port driver windows 10 stm32 virtual com port driver windows 10](https://oemdrivers.com/sites/default/files/2020-03/usbg-rs232.jpg)
Creating bundles of real and virtual COM ports.Also, you’ll be able to join multiple real port data streams into virtual one which will be directed to the required app or device. You can easily split a single real RS232 port into multiple virtual COM ones that will fully emulate the physical port. Splitting and joining serial data streams.The utility comes with a range of advanced features like:
![stm32 virtual com port driver windows 10 stm32 virtual com port driver windows 10](https://www.windows10download.com/softwareimages/virtual-com-port-driver.jpg)
This edition is tailored for professional use by serial port software and hardware developers and testers. Pro version of Virtual Serial Port Driverįor those of you who are looking for a simple way to create not only virtual COM port pairs but also their bundles with various custom parameters, the app developers offer the Virtual Serial Port Driver PRO version.