<![CDATA[Internal pull-up support on Unit PbHub / Unit EXT.IO2?]]>Hello,
I am using Unit PbHub and would like to ask about internal pull-up resistors.
The STM32F030 used in PbHub and EXT.IO2 supports internal pull-up/pull-down at the hardware level, but I could not find any way to enable pull-ups using the current M5Stack libraries. There seems to be no API to configure pull modes.
Is it currently possible to enable internal pull-up resistors on PbHub or EXT.IO2?
If not, is firmware modification the only option, or are there plans to support this in the future?
I would appreciate any official clarification or recommended workaround.
Thank you.

]]>https://community.m5stack.com/topic/8062/internal-pull-up-support-on-unit-pbhub-unit-ext-io2RSS for NodeWed, 29 Apr 2026 02:45:28 GMTThu, 05 Feb 2026 12:51:13 GMT60<![CDATA[Reply to Internal pull-up support on Unit PbHub / Unit EXT.IO2? on Thu, 05 Feb 2026 19:55:22 GMT]]>@felmue
Thank you for the clarification.
Yes, it seems that internal pull-up/pull-down resistors cannot be controlled at the moment.
I also checked the documentation, but could not find any way to configure this, which is why I posted the question here.

I hope this feature can be supported in the future, as it would be very useful in practice.

Thanks again for sharing your experience.

]]>https://community.m5stack.com/post/30596https://community.m5stack.com/post/30596Thu, 05 Feb 2026 19:55:22 GMT<![CDATA[Reply to Internal pull-up support on Unit PbHub / Unit EXT.IO2? on Thu, 05 Feb 2026 15:21:37 GMT]]>Hello @sk-ys

currently PbHub does not support internal pull-up/pull-down resistors. See FAQ at the end of the documentation page here. I assume the same is true for EXT.IO2.

Note: I have no idea if there are plans to support this feature in the future.

BTW: I faced the same issue a while ago and I resorted to adding some 10 k SMD resistors to the inputs.

Thanks
Felix

]]>https://community.m5stack.com/post/30595https://community.m5stack.com/post/30595Thu, 05 Feb 2026 15:21:37 GMT