Observed arrival · 2026-10-25
InOutPin’s GPIO safety planner
A browser-based planner for choosing microcontroller pins, checking wiring conflicts, and preparing project files.
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Microcontroller and electronics hobbyists
- Worth noticing
- Its ESP32 example flags GPIO12: a strap pin that can select 1.8V flash at reset and prevent some 3.3V-flash modules from booting.
Field notes
The planner’s ESP32 example marks GPIO12 as electrically usable but best left alone: its reset state can select 1.8V flash, potentially stopping modules with 3.3V flash from booting. The homepage also says the tool checks I2C address clashes, level-shifting needs, and power budgets, and can export pins.h, a sketch, and platformio.ini. Those are presented as available features, not future plans.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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