Unity www poll script

InputJSON.cs

public class InputJSON
{
    public float Input;
}

InputPoll.cs

using System.Collections;
using System.Diagnostics;
using UnityEngine;
using Newtonsoft.Json;

public class InputPoll : MonoBehaviour
{
    const string url = "http://192.168.1.92/stuff.json";
    private bool _coroutineStatus = false;
    private float _inputStatus;

    private Stopwatch stopwatch;
    private float _lastExecuteTime;

    public float TimeBetweenExecutions = 0.5f;

    void Start()
    {
        stopwatch = new Stopwatch();
    }

    void Update()
    {
        if (!_coroutineStatus)
        {
            _coroutineStatus = true;

            StartCoroutine(Poll(TimeBetweenExecutions - _lastExecuteTime /1000));
        }
    }

    IEnumerator Poll(float waitTime)
    {
        yield return new WaitForSecondsRealtime(waitTime);
        StartCoroutine(DoPoll());
    }

    IEnumerator DoPoll()
    {
        stopwatch.Restart();
        WWW www = new WWW(url);
        yield return www;
        _inputStatus = JsonConvert.DeserializeObject<InputJSON>(www.text).Input;
        www.Dispose();
        _coroutineStatus = false;
        stopwatch.Stop();
        _lastExecuteTime = stopwatch.ElapsedMilliseconds;
    }
}