<![CDATA[Touch Buttons and Styluses]]>Rop's latest sample (M5Sound, in this forum) make me wonder what a reasonable, minimum size and spacing should be for TouchButtons. At almost 80 X 60 pixels, the DTMF buttons are usable, but already require some care with only 12 on the screen.
I dug up an old passive capacitive stylus (the kind that looks like a soft pencil eraser) and found it increases speed and accuracy. Maybe a 50 X 50 pixel button would be usable with the passive stylus (doubling the number of buttons available.)
I see that there are active capacitive styluses available with much smaller tips. Does anyone have one? Does it work well with the Core2?

]]>https://community.m5stack.com/topic/2385/touch-buttons-and-stylusesRSS for NodeWed, 29 Apr 2026 20:13:45 GMTFri, 16 Oct 2020 21:19:26 GMT60<![CDATA[Reply to Touch Buttons and Styluses on Mon, 19 Oct 2020 10:57:48 GMT]]>Hi Van

thank you for the test application. I've added my test (using a finger) in the issues section. I think I have a stylus somewhere and when I find it I'll give it another go.

Cheers
Felix

]]>https://community.m5stack.com/post/10400https://community.m5stack.com/post/10400Mon, 19 Oct 2020 10:57:48 GMT<![CDATA[Reply to Touch Buttons and Styluses on Sat, 17 Oct 2020 22:36:35 GMT]]>I wrote a program to see what a reasonable minimum size touch button is: https://github.com/vkichline/ButtonSizeTest
It's a test you play: it lets you choose what size button and what spacing; it makes a bunch of buttons and asks you to press eight of them. At some point you should stop getting perfect scores.
I'd be interested in hearing what people find a usable minimum to be.

Caution: to use this app, you need RopG's PR for M5Core2. You can download the touch button version of the lib here: https://github.com/ropg/M5Core2.

]]>https://community.m5stack.com/post/10370https://community.m5stack.com/post/10370Sat, 17 Oct 2020 22:36:35 GMT