How to get input value to js when button click in mganto 2 knockout js, when having two input field in same template?

I am having two input field one for phone number and other for OTP. When click the submit button for OTP also I get the phone number value. How can I get the OTP value when the OTP button click?

Template file

 

     Send OTP


 

        
            
        
    

        
            
        
    

Js file

define([
    'underscore',
    'uiRegistry',
    'ko',
    'Magento_Ui/js/form/element/abstract',
    'Magento_Ui/js/modal/modal'

],  function (_, uiRegistry, ko, Component,modal) {
    'use strict';
   return Component.extend({       
        isShowPhoneButton: ko.observable(false), 


        showPhonePopUp: function (){debugger;
            var _self = this;          
            var mobileNumber = _self.value();

        },
        changeOTP: function (){debugger;
            var _self = this;          
            var otp = _self.value();

        },

    });
});