Dear @soohyun
Could you share how you connect module to PC? It is better to provide a picture.
Please confirm the power suppy is enough for module.
I also sent the latest driver to you via Message, please check.
When I click on the link to download the ‘Quectel_Windows_USB_Driver(Q).zip’ you sent me, the error ‘Site cannot be reached’ appears. Could you send it again?
5V/2A power is connected to the 5V/3A power adapter, but the ‘device can not start’.'Error has appeared. How can you solve it? Can I solve it by connecting the power adapter of 3A?
The picture shows me connecting the module to the laptop.
Thank you for your help.