I'm dealing with the seller to be refund... Did you buy it on ebay (alice1101983) ? Maybe dysfonctionning set.

I cannot use serial to upload firmware on Onstep board (with BOOT0=1). I don't try to communicate. However uploading firmware is working when skirting R3 with a 10k resistor. I don't try to replace it

I have the same behavior. I think you can change R3 by 10k, I'll test.

Hello, I have bought two Blue Pills on ebay on which BOOT0 is not working....If it is the same issue for you, you can check by mesuring voltage between R3 and BOOT0 pin of the chip. In my scenario, I

Hello, I have bought this product on Amazon which is more expensive (but you can send it back freely on amazon if necessary) : https://www.amazon.fr/gp/product/B07TSKNWQQ/ref=ppx_yo_dt_b_asin_title_o0

Thank you very much. I tried with ST-Link Utility, the CS is 64K. I found a seller on ebay who assures me the ST chip : https://www.ebay.fr/itm/5325-1-%C3%A0-10pcs-STM32F103C8T6-ARM-STM32-Development-

The blue pills I have bought are provide white CS chip (not ST) : https://www.cnx-software.com/2019/02/10/cs32-mcu-stm32-clone-bluepill-board/

Thank you for your answer. I bought it by following the link indicated in the wiki. I'm afraid to find more and more "case with the Chinese clone chip". I'll try another seller. Romain

Hello, I have built an Onstep controler based on a blue pill hardware witch currently works fine. I have recently bought other STM32 blue pill using the link given in the project desciption : https://