Lightbulb example using Secure ECMAScript from talk given at Agoric meetup December 5, 2019 after TC39 San Francisco

app.js

/*
 * Copyright (c) 2019  Moddable Tech, Inc.
 *
 *   This file is part of the Moddable SDK.
 *
 *   This work is licensed under the
 *       Creative Commons Attribution 4.0 International License.
 *   To view a copy of this license, visit
 *       <http://creativecommons.org/licenses/by/4.0>.
 *   or send a letter to Creative Commons, PO Box 1866,
 *   Mountain View, CA 94042, USA.
 *
 */

import MY92x1 from "my92x1";
import Timer from "timer";

// Sonoff B1 write order: W C 0 G R B.

let light = new MY92x1;
const brightness = 255;
let interval = 750;
let step = 0;

Timer.repeat(id => {
	switch (step) {
		case 0:		// red
			light.write(0, 0, 0, brightness, 0, 0);
			break;
		case 1:		// green
			light.write(0, 0, 0, 0, brightness, 0);
			break;
		case 2:		// blue
			light.write(0, 0, 0, 0, 0, brightness);
			break;
		case 3:		// warm
			light.write(brightness, 0, 0, 0, 0, 0);
			break;
		case 4:		// cool
			light.write(0, brightness, 0, 0, 0, 0);
			break;
		case 5:		// cool + warm
			light.write(brightness, brightness, 0, 0, 0, 0);
			break;
	}

	step += 1;
	if (step > 5) {
		step = 0;

		interval = Math.max(100, interval - 125);
		Timer.schedule(id, interval, interval);
	}
}, 750);

main.js

const map = Compartment.map;
const whiteListMap = {
	"main": map.app,
	"my92x1": map["my92x1-attenuated"],
	"timer": map.timer,
};

const compartment = new Compartment("main", {}, whiteListMap);

manifest.json

{
	"include": [
		"$(MODDABLE)/examples/manifest_base.json",
		"$(MODULES)/pins/digital/manifest.json",
	],
	"modules": {
		"*": [
			"./main",
			"./app",
			"./my92x1-attenuated",
			"$(MODULES)/drivers/my92x1/*",
		],
	},
	"preload": [
		"my92x1",
		"my92x1-attenuated",
	],
}

my92x1-attenuated.js

import MY92x1 from "my92x1";

const maxBrightness = 16;		// range: 0 to 255
const minInterval = 500;		// units: milliseconds

class Attenuated {
	#driver = new MY92x1;
	#lastWriteTime = Date.now() - minInterval;

	write(...colors) {
		const now = Date.now();

		if ((now - this.#lastWriteTime) < minInterval) {
			trace("my92x1: ignore write\n");
			return;
		}

		trace("my92x1: write\n");

		this.#lastWriteTime = now;

		colors = colors.map(color => (color / 255) * maxBrightness);
		this.#driver.write(...colors);
	}
}

export default Attenuated;