Turn an STM32F103C8T6 (BluePlll) into an STLink Programmer

It is relatively easy to turn an STM32F103C8T6 (BluePill) into an STLink programmer. All that is needed is a copy of the STLink firmware and a means to flash it. Do a search for STLinkV2.J16.S4 and download it. Flash that binary file into the STM32F103C8T6.

The new STM32F103C8T6 STLink can then be upgraded to the latest firmware version from https://www.st.com.

Here is the wiring diagram on how to connect the new STM32F103C8T6 STLink programmer to another STM32F103C8T6 to program it:

BluePill as an Stlink ProgrammerDownload the Fritzing Diagram from HERE. Actually, the capacitor and 4k7 resistors on the right side of the diagram are not needed (it works fine without them).

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