Test1

/* ── Module: Sensor Monitor — thin entry ──
 * Registers the module on App.modules and wires up its parts.
 * Every Arsyn module exposes render(vp): it draws into the given
 * viewport element and (optionally) returns a cleanup function.
 */
import { sensorState } from './sensor-state.js';
import { renderPanel } from './sensor-ui.js';

App.modules.sensor = Object.assign(sensorState, {

  render(vp) {
    // vp is the viewport container Arsyn hands you.
    vp.innerHTML = `
      <div class="sensor-view" style="padding:1rem">
        <h2>Sensor Monitor</h2>
        <div id="sensor-readout" class="sensor-readout">–</div>
        <button id="sensor-toggle" class="btn btn-primary">Start</button>
      </div>
    `;

    renderPanel(vp, sensorState);

    // Return a cleanup function — Arsyn calls it when the module closes.
    return () => sensorState.stop();
  },
});

/* ── Sensor state + logic (no DOM in here) ── */
export const sensorState = {
  _timer: null,
  value: 0,
  running: false,

  start(onTick) {
    if (this.running) return;
    this.running = true;
    this._timer = setInterval(() => {
      this.value = Math.round(Math.random() * 100);
      onTick?.(this.value);
    }, 500);
  },

  stop() {
    this.running = false;
    clearInterval(this._timer);
    this._timer = null;
  },
};

/* ── Sensor UI bindings (DOM only) ── */
export function renderPanel(vp, state) {
  const readout = vp.querySelector('#sensor-readout');
  const toggle  = vp.querySelector('#sensor-toggle');

  toggle.addEventListener('click', () => {
    if (state.running) {
      state.stop();
      toggle.textContent = 'Start';
    } else {
      state.start(v => { readout.textContent = v + ' units'; });
      toggle.textContent = 'Stop';
    }
  });
}

# Sensor Monitor

A tiny example Arsyn module. It shows the standard shape of every module:

- **module-sensor.js** — thin entry, registers on `App.modules`
- **sensor-state.js** — state & logic, no DOM
- **sensor-ui.js** — DOM bindings only

## Install
Drop these files into your Arsyn `modules/` folder and reload the app.