function does not act on gameobject when called from another script

Questions & Answers
1

Someone could tell me why when I call the “playing1” function from a button (using the inspector’s OnClick and selecting the object to which the script is attached) it performs the “print (” enter “);” and the “indica1” .SetActive (true); “, but when calling this function from another script, just execute” print (“enter”); "?

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

public class Principal : MonoBehaviour
{
    
    public GameObject indica1;
   
   (...)


    public void playing1(string _velocity)
    {
         print("enter");        
         indica1.SetActive(true);
     }
}

follows the excerpts of the script where the call is made:

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

using System.IO;
using System.IO.Ports;
using System;

using System.Threading;

public class UnitySerialPort : MonoBehaviour
{
	Principal principal;

        void Start ()
	{
		principal = gameObject.GetComponent<Principal>();
                string valorComando = "100";
	}

        (...)

	private void GenericSerialLoop ()
	{
	         switch (comando){

			case "p":
				principal.playing1(valorComando);
				break;

                 }
         }
}
2

Hello.

You tellig you have this function:

 public void playing1(string _velocity)

attached to a button Click event? Did you debugged the code? How is the value of _velocity assigned?