[ {
"pumpId": 33,
"pVVoltage": "214",
"pVCurrent": "0",
"epochTime": 1482690480000
},
  {
"pumpId": 33,
"pVVoltage": "214",
"pVCurrent": "0",
"epochTime": 1482690480000
}
]

<button type="button" class="btn btn-primary btn-sm" ng-click="get_report(report_from_time, report_to_time)">Download</button>

PumpService.getReport($scope.id, $scope.timestamp_report_from_time, $scope.timestamp_report_to_time).success(function (data) {
                $scope.reportData = data;
            }).error(function (error) {
                console.error('ERROR OCCURED:', +error);
            })