Uploaded February 2024 | Updated September 2026, 4 hours ago
I use a whole bunch of Wemos D1 Mini's with my LED lighting controllers at terraintronics.com
Recently, I went to reprogram a bunch of them and my Windows 11 PC refused to function correctly with the boards.
Turns out it was Microsoft overwriting the driver I was using, because they thought they had a better one. Uh... NO WAY!
My workaround, and maybe it can work for you is: -- links are below this order of operations
1) Unplug The Wemos D1.
2)Disable automatic windows updates
3) Use the CH340 Driver Install app in Administrator mode to REMOVE the current driver.
4) Restart the same app in Administrator mode to INSTALL version 3.5 of the driver
5) Plug in your Wemos D1 with Device Manager open (you should see DM refresh with a new serial port)
6) Confirm functionality (Serial port actually working) using Putty
7) Update the standard BLINK code with faster timing, just to see if it is able to communicate with the Wemos D1 and reprogram it.
Important Links:
Dells' guide to stopping automatic updates: dell.com/support/kbdoc/en-us/000194492/how-to-stop-windows-updates-from-downloading-and-installing
CH340 Driver 3.5: https://www.arduined.eu/ch340-windows-10-driver-download/
Putty: putty.org
I use a whole bunch of Wemos D1 Mini's with my LED lighting controllers at terraintronics.com
Recently, I went to reprogram a bunch of them and my Windows 11 PC refused to function correctly with the boards.
Turns out it was Microsoft overwriting the driver I was using, because they thought they had a better one. Uh... NO WAY!
My workaround, and maybe it can work for you is: -- links are below this order of operations
1) Unplug The Wemos D1.
2)Disable automatic windows updates
3) Use the CH340 Driver Install app in Administrator mode to REMOVE the current driver.
4) Restart the same app in Administrator mode to INSTALL version 3.5 of the driver
5) Plug in your Wemos D1 with Device Manager open (you should see DM refresh with a new serial port)
6) Confirm functionality (Serial port actually working) using Putty
7) Update the standard BLINK code with faster timing, just to see if it is able to communicate with the Wemos D1 and reprogram it.
Important Links:
Dells' guide to stopping automatic updates: dell.com/support/kbdoc/en-us/000194492/how-to-stop-windows-updates-from-downloading-and-installing
CH340 Driver 3.5: https://www.arduined.eu/ch340-windows-10-driver-download/
Putty: putty.org
