Device support issue for Bluepill stm32F10336t6

[Erfan Mahmud Tushar]

Hello,
My blue pill contains a chip of stm32F103c6t6.
I am using STM32 core by STMicroelectronics (Arduino IDE).
I followed all the processes of installing this HID bootloader. But when I connect the USB cable to my Windows PC , the device manager says,

unknown USB device (device descriptor request failed)

How I can solve this?

[mcer12]

You probably mean STM32F103C6T6, I also have these chips (from aliexpress) and I wasn't able to make this bootloader work. STM32F103C8T6 works fine. Mind that C6T6 is a different - lower tier - part, it doesn't differ only in memory but it lacks some peripherals. They for example lack second SPI interface. That may be the reason why this bootloader doesn't work.

[Patryk Ludwikowski]

I have the same issue I think.