I have been playing with my Raspberry Pis to see what is working, as compared to how a photon responded. But now that the photons updated the firmware to .60 I no longer get a COM assigned to the photons. Instead there is an entry in the device manager for ‘libusbK USB devices’. Why have I lost the …

This might be a side effect of the newly added USB HID Mouse/Keyboard/secondary Serial feature. I had to remove the COM drivers from my system completely (even for hidden/non-present devices). Can you show a screenshot of DevMgr and zadig (with the devices list open)? Here is how to show non-pres…

The photons were showing up as libusbK devices, used Zadig to change the driver to winUSB(v6.1.7600.16385) still not showing as COM. Now showing under Serial USB Devices. What is the easiest way to upload the capture? What do I have to do to backup the firmware back to .5.3?

You can just drag’n’drop the image or use the upload icon to post a screenshot. And to downgrade, you’d need to get the system binaries from GitHub and flash the system parts in revers order particle flash --usb system_firmware_part2.bin particle flash --usb system_firmware_part1.bin particle flas…

If you want to set the driver via zadig, you’d need to use USB Serial (CDC) and not WinUSB But have you tried to remove the Particle drivers for non-present devices as mentioned above?

Fixed!! Knowing the right driver helps! Thanks ScruffR.

I have a Photon that after automatically updating to 6.0.0 firmware stopped being recognized via the Particle DEV Serial Monitor app. I now can only see the serial output from the Photon if I use TeraTerm Serial Monitor software. Looks like I will need to follow this thread to make the necessary ch…

@RWB , that might be in connection with the newly added DTR/RTS flow control feature. You can try activating that in DevMgr and see if that helps.

@ScruffR I tried all the Flow control settings but I can still not connect to the Photon using the Particle DEV software Serial Monitor app. I uninstalled the Photon and checked the box to delete the current driver software and that made no difference. I’m restarting the machine now.

@ScruffR I replaced the driver via Zadig to USB Serial (CDC) Now I can access the Photon via the Particle Dev software via serial com 10. What is com 11 doing? [image] Now I have 2 devices show up in the device manager. Is this correct or did I do something wrong? [image]

No com port being assigned to my (photon) devices

Troubleshooting

Topic		Replies	Views
Photon lost XP drivers Firmware	5	2912	December 31, 2016
Photon Installation - Windows 10 Driver - Other Driver Category Not Shown Getting Started	29	13973	September 17, 2020
Win 10 no com port Troubleshooting	1	904	March 28, 2018
USB serial ports gone missing with V0.5.0 update Troubleshooting	1	925	April 27, 2016
0.6.0.rc1 - USB Serial - only seeing one but expect two Firmware	26	4500	August 24, 2017

No com port being assigned to my (photon) devices

Related topics