# Using a GPIO Input to alter a pattern **URL:** \ **Category:** Troubleshooting\ **Created:** [October 16, 2025, 5:09am UTC](https://forum.electromage.com/t/using-a-gpio-input-to-alter-a-pattern/4556 "2025-10-16T05:09:13Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![wizard](https://forum.electromage.com/user_avatar/forum.electromage.com/wizard/32/4_2.png) [@wizard](https://forum.electromage.com/u/wizard)\ **Post date:** [October 16, 2025, 4:31pm UTC](https://forum.electromage.com/t/using-a-gpio-input-to-alter-a-pattern/4556/2 "2025-10-16T16:31:48Z")
Two approaches. You could do this in one pattern, basically use if in code to do something when a gpio is a particular level. Could use delta to control timing to have it run for a minimum period or fade in/out. Another way is to use playlists and the sequencer api. You can jump to a specific playlist position. some related posts: > [@The Technocolour Dreamcoat, phone-free Burning Man 2023 edition!](https://forum.electromage.com/t/the-technocolour-dreamcoat-phone-free-burning-man-2023-edition/3115/3): > > Well, sure. Here’s the code: export function beforeRender(delta) { // ... // enable next/forward buttons debounceNext(delta) debouncePrev(delta) } export var analogInputs var DEBOUNCE\_TIME = 40; var nextBtnState; var nextBtnTimer; function debounceNext(delta) { var newState = analogInputs[2] \> 0.5; if (newState == nextBtnState) { nextBtnTimer = 0; } else { nextBtnTimer += delta; } if (nextBtnTimer \> DEBOUNCE\_TIME) { nextBtnState = newState; if (nextBtnStat… > [@API for changing patterns (… in a playlist)?](https://forum.electromage.com/t/api-for-changing-patterns-in-a-playlist/3108/5): > > Good news @ratkins ! Here’s a beta build with sequencer APIs. This should let you implement what you are looking for with a bit of pattern code. You’ll need to copy some code to each pattern for reading/debouncing SB inputs and going next/prev, but cleaner than making a mega pattern. Standard: [v3.49.pb32.stfu](https://forum.electromage.com/uploads/short-url/nnju0XfFsrRvgdXVvMo33WiVfnV.stfu) (1.4 MB) Pico: [v3.49.pico32.stfu](https://forum.electromage.com/uploads/short-url/vFY0A0UZaj7ueBmc2fRj4lJQNu6.stfu) (1.4 MB) Docs haven’t been updated, but here’s what’s new: sequencerNext() Universal advance to next pattern, pretty much the same as button press. Th… Hardware wise, if it’s 3.3v then you can wire it directly. --- _[View the full topic](https://forum.electromage.com/t/using-a-gpio-input-to-alter-a-pattern/4556)._