Please help. When I add Vuforia and scripts the bluetooth no longer works.

Hello everyone, and I hope you can help me sort this out.
So I’m trying to make an augmented reality remote for Arduino. I bought the Bluetooth asset from Tech Tweaking, and everything worked fine until then.
When I added the Vuforia part, the asset no longer worked. It had a button that said “Open devices” and listed the Bluetooth devices that were available. Yet when I add the AR part, it no longer does it. Any idea on why this happens and how to solve it? I leave the codes I’m using for further details. Thanks in advance for the help.
This one is for detecting the touch on the AR cube

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

public class camera : MonoBehaviour {
    // Update is called once per frame
    void Update () {

        int touchCorrection = 1;

        RaycastHit hit = new RaycastHit();
        for (int i = 0; i+touchCorrection < Input.touchCount; ++i) {
            if (Input.GetTouch(i).phase.Equals(TouchPhase.Began)) {
                // Construct a ray from the current touch coordinates
                Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(i).position);
                if (Physics.Raycast(ray, out hit)) {
                    hit.transform.gameObject.SendMessage("OnMouseDown");
                }
            }
        }

    }
}

This one is for detecting changing the object color and changing the text that is supposed to be sent to the Arduino.

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine.UI;

public class red : MonoBehaviour {

    public Text dataToSend;
    bool isHighlighted = false;
    Material originalMaterial;
    Material redMaterial;
    MeshRenderer meshRenderer;

    GameObject baseObject;
    string obj_name;
    // Use this for initialization
    void Start () {
        obj_name        = this.gameObject.name;
        baseObject      = GameObject.Find( obj_name );
        meshRenderer        = baseObject.GetComponent<MeshRenderer>();
        originalMaterial    = meshRenderer.material;

        Color red           = new Color(255.0f,0.0f,0.0f,0.5f);
        //Color red           = new Color(255.0f,0.0f,0.0f, 0.5f);
        redMaterial         = new Material(Shader.Find("Transparent/Parallax Specular"));
        redMaterial.color   = red;

    }

    // Update is called once per frame
    void Update () {

    }

    void OnMouseDown(){

        Debug.Log("OMD "+obj_name);
        isHighlighted = !isHighlighted;

        if( isHighlighted == true ){

            HighlightRed();
            dataToSend.text = "<U>";

        }
        if ( isHighlighted==false ){

            RemoveHighlight();
            dataToSend.text = "<u>";
        }
    }

    void HighlightRed(){

        meshRenderer.material = redMaterial;
        Debug.Log("IT SHOULD BE RED");
    }

    void RemoveHighlight(){

        meshRenderer.material = originalMaterial;
    }

}

And this last one for activating a button from within the script that sends the text via bluetooth.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class fake_click : MonoBehaviour {

    [SerializeField] GameObject[] buttons;
    int buttonIndex = 0;

    void OnMouseDown () {
        ExecuteEvents.Execute<IPointerClickHandler>(buttons[buttonIndex] , new PointerEventData(EventSystem.current),ExecuteEvents.pointerClickHandler);
    }
}

Did you find a solution to this? I’m having the same issue

Any update on this?