Button Press with ESP8266 Working in Desktop Unity Program but not on Phone

Hello,

I've connected a 5-way tactile switch to an ESP8266 module and am using the Arduino IDE to program it. I've also connected my Arduino code to Unity3D. Essentially, if the button is pressed, my Arduino program prints the direction that the button was pressed in onto an automatically updating web server. In my Unity code, I read the text from the webpage and pan the scene according to the direction printed there. This is working perfectly on my laptop, but once I build and run the Unity program onto an Android phone, the panning no longer works. The phone and the ESP8266 are both on the same WiFi network. The button directions print fine when I go to the IP address on the phone, so I'm assuming that the problem is with the Unity code. Does anyone know what is wrong? Below is my code. Thank you!

 using System;
 using System.Collections;
 using System.IO.Ports;
 using System.Collections.Generic;
 using UnityEngine;

 public class StreetViewCamera: MonoBehaviour {
   
 private string textFromWWW;
 private string url = "http://192.168.1.10/"; // <-- enter your url here

 IEnumerator GetTextFromWWW()
 {
     WWW www = new WWW(url);

     yield return www;

     if (www.error != null)
     {
         Debug.Log("Ooops, something went wrong...");
         Debug.Log(www.error);
     }
     else
     {
         textFromWWW = www.text;
         Debug.Log(textFromWWW);
     }
 }
 private void Update()
 {
     StartCoroutine(GetTextFromWWW());
     Boolean  up = true;
     Boolean down = true;
     Boolean left = true;
     Boolean right = true;
     Boolean center = true;
     Boolean empty = true;

     try
     {
       //isolates the single letter indicating the direction from the rest of textFromWWW
        string stringText = Convert.ToString(textFromWWW);
         string substring = stringText.Split('^')[0];
         Debug.Log("SUB: " + substring);
         int index = ((substring.Length) - 1); //index of last character, which will be the direction reading
         string reading = Convert.ToString(substring[index]); //convert to string from char
         Debug.Log("READING: " + reading);

         while (up && reading.Equals("U")){
             movein();
             up = false;
         }
         while (down && reading.Equals("D"))
         {
             moveout();
             down = false;
         }
         while (left && reading.Equals("L"))
         {
             moveleft();
             left = false;
         }
         while (right && reading.Equals("R"))
         {
             moveright();
             right = false;
         }
         while (center && reading.Equals("C"))
         {
             Debug.Log("center running");
            center = false;
         }
         while (empty && reading.Equals("E"))
         {
             Debug.Log("empty running");
            empty = false;
         }
         subZInput = 0;
         subXInput = 0;
     }
     catch (System.Exception)
     {
     }
 }

 private void movein(){
     transform.position += transform.forward * 50 * Time.deltaTime;
 }
 private void moveout()
 {
     transform.position += transform.forward * -50 * Time.deltaTime;
 }

 private void moveleft()
 {
     transform.position += transform.right * -50 * Time.deltaTime;
 }
 private void moveright()
 {
     transform.position += transform.right * 50 * Time.deltaTime;
 }

}