Control car with iPhone's acceleration sensor
Obniz make it easy to use smartphone sensors for electronics.
You can get acceleration sensor value using only 3 lines.
window.addEventListener("devicemotion", function (event1) {
let x = event1.accelerationIncludingGravity.x;
}Using it, the code of control car is here.
Program
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://obniz.io/js/jquery-3.2.1.min.js"></script>
<script src="https://unpkg.com/obniz@2.0.2/obniz.js" crossorigin="anonymous"></script>
</head>
<body>
<div id="obniz-debug"></div>
<h1>obniz robot controller </h1>
<div id="print"></div>
<script>
let obniz = new Obniz("OBNIZ_ID_HERE");
let motorL, motorR;
let threshold = 1, maxAccel = 5;
obniz.onconnect = function () {
motorL = obniz.wired("DCMotor", {forward: 0, back: 1});
motorR = obniz.wired("DCMotor", {forward: 2, back: 3});
};
window.addEventListener("devicemotion", function (event1) {
let x = event1.accelerationIncludingGravity.x;
let y = event1.accelerationIncludingGravity.y;
if (!motorR || !motorL) {
return;
}
if (Math.abs(y) > threshold) {
let power = Math.min(100 * (Math.abs(y) - threshold) / (maxAccel - threshold), 100);
motorL.power(power);
motorR.power(power);
let direction = y > 0;
motorL.move(direction);
motorR.move(direction);
} else if (Math.abs(x) > threshold) {
let power = Math.min(100 * (Math.abs(x) - threshold) / (maxAccel - threshold), 100);
if (x > 0) {
motorR.power(power);
motorR.move(true);
motorL.stop();
} else {
motorL.power(power);
motorL.move(true);
motorR.stop();
}
} else {
motorL.stop();
motorR.stop();
}
}, true);
</script>
</body>
</html>