R2D2

rotate_top.js

const MSG_ROTATE = [0x0A,0x17,0x0F];


let convertDegreeToHex = (degree) => {
    var view = new DataView(new ArrayBuffer(4));
    view.setFloat32(0, degree);
    return Array
        .apply(null, { length: 4 })
        .map((_, i) => view.getUint8(i))
}


let droidAddress = 'd7:1b:52:17:7b:d6';


connectTheDroid(droidAddress).then(characteristic => {
    characteristic.subscribe(async(error) => {
        if (error) {
            console.error('Error subscribing to char.');
        } else {
            console.log("Wait for init!");
            await writePacket(characteristic, buildPacket(MSG_INIT), true, 5000);

            console.log('Rotate the droid!');
            for (let degrees = -160 ; degrees <= 180 ; degrees+=5) {
                await writePacket(
                    characteristic,
                    buildPacket(MSG_ROTATE, convertDegreeToHex(degrees)),
                    false,
                );
            }
        }
    });
});