color of the knob cannot be updated after server data request about ng-knob

[yuniers]

I'm try it too and want do a countdown like a watch but colour is not changing.

[sabbir-hossain]

I solve this problem by using the following code :

angular.module('', [])
     .controller('DemoCtrl', function($scope, $timeout) {
         $scope.options = { /* knob option */   };
         $scope.details = 0;
          $http
               .get(url)
               .then(function(res) {
                    $timeout(function() {
                        $scope.details = res.data.rating   
                    }, 1000);                             
           }, function(err) {});
     });

[mbostwick]

Created pull request to fix this..