i bought my bluepills in late 2017 / early 2018 and left them in the box since then. After getting back to the pills, i read about fakes comming up arround the time i bought mine. Therefore i'm not sure if these boards contain chips manufactured by STM or fake ones.
To test the boards i installed stm32f103c8 diagnostics v 1.640 on one of them. The test for 128kb of flash is passed successfully, but the results shown below are printed when running the stm32f193c8 authenticity test.
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STM32F103C8 authentication FAILED one or more tests:
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FAIL - Declared flash not 65536
PASS - DBGMCU_IDCODE is NOT readable without SWD/Jtag connected
PASS - Second 64KB flash block verified
PASS - JDEC manufacturer id IS STMicroelectronics
Any thoughts concerning the question are wellcome.
Best regards
Gregor