sample.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using AddressableAssetsTool;

public class Sample : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        // set the BASE URL
        AddressableAssets.Init("{{BASE_URL}}");
        
        // Get Preload size need to download
        AddressableAssets.GetSizeAsync("Preload").Completed += (res) =>
        {
            var size = res.Result;
            if (size > 0)
            {
                // need to download update
                var handle = AddressableAssets.DownloadDependenciesAsync("Preload");

                handle.Completed += (preload) =>
                {
                    // download completed. change to next scene!!
                };

            } else
            {
                // no need download. change to next scene!!
            }
        };
    }
}