<![CDATA[GPIO16 as input not working?]]>Hi

I am trying to use GPIO16 as input on an M5Stack Core, but it does not work.
I tried using GPIO35 instead and that worked fine.

But I want this signal on GPIO16. Any ideas on how to make that work?
When searching for info on this I have not found any info that it shouldn't work. In general it says that it should work to use GPIO16 both as output and input.

I am using GPIO17 as output and that is working fine.

]]>https://community.m5stack.com/topic/3999/gpio16-as-input-not-workingRSS for NodeThu, 30 Apr 2026 10:33:58 GMTThu, 03 Feb 2022 17:16:10 GMT60<![CDATA[Reply to GPIO16 as input not working? on Fri, 04 Feb 2022 05:09:52 GMT]]>GPIO is written in PinMap of M5Unified.

M5Unified：PinMap
https://github.com/m5stack/M5Unified

0_1643950391586_pinmap.png

]]>https://community.m5stack.com/post/16520https://community.m5stack.com/post/16520Fri, 04 Feb 2022 05:09:52 GMT<![CDATA[Reply to GPIO16 as input not working? on Fri, 04 Feb 2022 05:03:14 GMT]]>Hello @Thomasx

judging from your other posts I assume you mean M5Core2 (the one with touch interface). If so on M5Core2 GPIO16 and GPIO17 are used internally for PSRAM - they cannot be used for anything else.

Note: if for whatever reason you really need GPIO16 as output you'd need to switch to an M5Stack (Basic, Go or Gray). Not M5Stack Fire as it also has PSRAM.

Thanks
Felix

]]>https://community.m5stack.com/post/16518https://community.m5stack.com/post/16518Fri, 04 Feb 2022 05:03:14 GMT