Re: Connect problem for a stm32 board

Dave Schwartz

I don't know whose PCB that is but it looks like the ST4 socket is probably the shielded one in the center bottom. If so, those are probably the (empty) pads for the pull-up resistor network to the left of it. Generally, SHC connections do not work without the pull-up resistor network.

On 2021-02-23 8:56 a.m., wrote:
Hi, I got a stm32 onstep controller locally, today I reflash it. It can answer "On-Step#" in serial monitor, it seems flashed succesfully.
But connect fail when I link hand cotroller and onstep controller.

Please help me to solve this, thanks a lot!

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