Multi-threading

Most Pi controllers stay on the main EventLoop thread: GPIO events, tickers, and Esc/Fn all dispatch there. Prefer that model.

If you need background work (long compute, blocking I/O that must not stall handlers), use Final Pips and Pipes. Overview: Threading and Patterns.

Notes for controllers:

• Only the main thread has an EventLoop. A Pip cannot register event handlers; it can send work results back on a Pipe for the main side to handle.
• Do not call long delayMs inside a handler — use EventTicker / EventTimer instead (Timer Events).
• Hardware setup/teardown (enabled!, GpioCtrl.inst.reset^) should stay on the main controller path unless you have a clear ownership scheme.