Case Studyraspberry pigpioopto isolationfinite state machine
Raspberry Pi Controls Double-Swing Gate Motors
5.9
An engineer documents a Raspberry Pi–based controller originally developed in 2017 and deployed in 2021 to operate double‑swing driveway gates using an Explorer Hat and SainSmart 4‑channel opto‑isolated 5V relays. An AI assistant dubbed 'Ava' reverse‑engineered a Finite State Machine and refactored code, while EMI damaged inputs during initial deployment, prompting opto‑isolation and input‑protection upgrades.
Key Points
- 1Documents deployment of Raspberry Pi controller for double‑swing gates using Explorer Hat and SainSmart relays.
- 2Shows AI 'Ava' generated Finite State Machine and refactored code, revealing logic assumptions and fixes.
- 3Recommends opto‑isolation and input protection due to EMI; prefer boolean flags for robust state handling.
Scoring Rationale
Practical deployment and AI-assisted FSM provide useful lessons, but single‑source DIY project limits broader applicability and impact.
Sources
Public references used for this report.
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