johnny-five-electron
Version:
Temporary fork to support Electron (to be deprecated)
69 lines (54 loc) • 1.74 kB
JavaScript
var five = require("../lib/johnny-five");
var board = new five.Board();
board.on("ready", function() {
// Plug the Temperature sensor module
// into the Grove Shield's A0 jack
var temperature = new five.Temperature({
controller: "GROVE",
pin: "A0"
});
// Plug the LCD module into any of the
// Grove Shield's I2C jacks.
var lcd = new five.LCD({
controller: "JHD1313M1"
});
var f = 0;
temperature.on("data", function() {
// The LCD's background will change
// color according to the temperature.
//
// Hot -> Warm: Red -> Yellow
// Moderate: Green
// Cool -> Cold: Blue -> Violet
//
// Experiment with sources of hot and
// cold temperatures!
//
if (f === Math.round(this.fahrenheit)) {
return;
}
f = Math.round(this.fahrenheit);
var r = linear(0x00, 0xFF, f, 100);
var g = linear(0x00, 0x00, f, 100);
var b = linear(0xFF, 0x00, f, 100);
// console.log("Fahrenheit: %d°", f);
lcd.bgColor(r, g, b).cursor(0, 0).print(f);
});
});
// [Linear Interpolation](https://en.wikipedia.org/wiki/Linear_interpolation)
function linear(start, end, step, steps) {
return (end - start) * step / steps + start;
}
// @markdown
// For this program, you'll need:
//
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// @markdown