Next, you will need to create an External Content Type (ECT) based on the OData source. We need to reiterate here that Hybrid BCS implementation only work with OData source based ECT. The ECT can only be created with Visual Studio and not with SharePoint Designer.
To create an ECT, you need the following requirements:
Using Visual Studio 2013, create a new SharePoint App:
This process will create the External Content Type for each of the entity you have selected.
Once you have created your External Content Type, you want to add the ECT to your Business Data Catalog (BDC) catalog so you can use it in your site collections.
In the previous section, we explain how you create an ECT, where each entity in the OData source represents a single ECT. However, the entities use a shared name in the ECT file, which will prevent you from uploading more than one entity to the BDC catalog. In order to fix this issue, you need to follow these steps to be able to use the entities in SharePoint:
Once you have made the changes to all of your ECT files, you can upload all your entities to your BDC model. To do so: