This article applies to:
In a Nutshell
When the driver is not working properly, you may see the below messages.
#1 When you upgrade the firmware, a window pops up, saying "Firmware Update Failed".
#2 When you Connect the device via the USB cable, a window pops up, saying"Connection Failed"
Step by Step
1. Check if the driver is functioning properly according to the steps below.
If not, the driver if faulty. Please move on the to next step.
2. Uninstall the existing driver first and install CH340 drivers from the official website.
Feel free to contact us at:
Help Us Solve Faster
We have listed some useful information you can provide to us.
When you contact us, the more information you provide,
the better informed we will be and the quicker we can advise and answer your questions.
Not Sure Where to Find the Version Info?