Ionic V1 Ionic-timepicker value have wrong format

ionic-v1
1

bonjour j’utilise un time picker , mais j’ai un problème de reccupération

<ionic-timepicker etime="slots.epochTime" format="slots.format" step="slots.step"
                                callback="timePickerCallback">
                                <button class="button button-block button-positive"> {{slots.epochTime}} </button>
                            </ionic-timepicker>

02: 15 give this value : 8100
I want to have 02:10 instead of 8100

        $scope.slots = { epochTime: 54900, format: 24, step: 1 };

        $scope.timePickerCallback = function (val) {
            if (typeof (val) === 'undefined') {
                console.log('Time not selected');
            } else {
                console.log('Selected time is : ', val);    // `val`al will contain the selected time in epoch
            }
        };