$("button").click(function(
 id = $(this).attr("id");
 toggle(id);
));

function toggle(id)
        {
            var username = "username";
            var password = "password";

            $.ajax(
            {
                url:'http://myname.ddns.net:port/api/devices/' + id,
                type: 'get',
                dataType : 'json',
                contentType: 'application/json',
                async: true,
                beforeSend: function(xhr) {
                    xhr.setRequestHeader('Authorization', 'Basic ' + btoa(username + ':' + password));
                },
                success: function(data)
                    {
                        if(data.properties.value == "true")
                        {
            $("#25").attr("src","../assets/images/icons/switch/off.png");

                            $.ajax(
                            {
url:"http://myname.ddns.net:91/api/devices/" + id +"/action/turnOff",
                                type: 'post',
                                dataType : 'json',
                                contentType: 'application/json',
                                async: true,
                                beforeSend: function(xhr)
                                {
                                    xhr.setRequestHeader('Authorization', 'Basic ' + btoa(username + ':' + password));
                                },
                            })
                        }
                            else if(data.properties.value == "false")
                        {
$("#25").attr("src","../assets/images/icons/switch/on.png");
                            $.ajax(
                            {
                                url:'http://myname.ddns.net:port/api/devices/"+id+"/action/turnOn',
                                type: 'post',
                                dataType: 'json',
                                contentType: 'application/json',
                                async: true,
                                beforeSend: function(xhr)
                                {
                                    xhr.setRequestHeader('Authorization', 'Basic ' + btoa(username + ':' + password));
                                },
                            })
                        }
                    }
            },3000)
        }