How do I use android bluetooth control in unity?

I am creating an ar app that has two ar buttons If I press these button I have to send the data to my Bluetooth device please give me the suggestion.

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

public class soundcon : MonoBehaviour {
	public AudioClip[] aClips;
	public AudioSource myAudioSource;
	string btnName;
	// Use this for initialization
	void Start () {
		myAudioSource = GetComponent<AudioSource>();
			
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.touchCount > 0 && Input.touches [0].phase == TouchPhase.Began) {
			Ray ray = Camera.main.ScreenPointToRay (Input.GetTouch (0).position);
			RaycastHit Hit;
			if(Physics.Raycast(ray, out Hit)){
				btnName = Hit.transform.name;
				switch (btnName) {
				case "myButton1":
					myAudioSource.clip = aClips [0];
					myAudioSource.Play ();
					break;
				case "myButton2":
					myAudioSource.clip = aClips [1];
					myAudioSource.Play ();
					break;
				default:
					break;
				}
				
		}
	}
}
}