ThingWorx Connection Services consist of the ThingWorx Connection Server, the ThingWorx Azure IoT Hub Connector, and the ThingWorx eMessage Connector. ThingWorx releases versioned updates to these products and certifies product quality through rigorous testing of these products with the ThingWorx Platform.

In the Software Downloads portal, PTC provides a version of each ThingWorx Connection Service that is the latest and works with the currently supported versions of ThingWorx Platform. PTC always fixes issues in the latest version of each Connection Service and replaces the older versions with the newer ones on the Software Downloads portal. This way, there is always one Connection Service version available for use with currently supported versions of the ThingWorx Platform. Unless otherwise stated, a new version is backward compatible with the versions of the platform supported by the replaced version of the Connection Service.

For example, suppose you downloaded the previous version of a Connection Service, for example, Connection Server v.8.5.x for ThingWorx Platform v.8.5.3. The Connection Server v.8.5.3 goes out of support when an updated version of the Connection Server, for example, v.8.5.4, is released. The new 8.5.4 version replaces the v.8.5.3 Connection Server for each supported ThingWorx Platform version on the Software Downloads portal. Similarly, when version 9.0.0 is released, it replaces the 8.5.x version for each supported ThingWorx Platform. The ThingWorx Connection Server, v.9.2.0 works with ThingWorx Platform versions 8.5.2 and later, 9.0.x, 9.1.x, and 9.2.x.

If incompatibilities with previous releases of ThingWorx Platform exist for any version of the Connection Services, PTC maintains more than one branch of the same Connection Service for the life of the corresponding ThingWorx Platform.

The Azure IoT Hub Connector v.3.0.x will be maintained and updated as an old line of that Connector for the life of ThingWorx Platform version 8.5.x. However, fixes will be made available only in the v.4.x.x line of the Connector to support ThingWorx Platform v. 9.0.x, v.9.1.x, and v.9.2.x. Due to backward incompatibilities, you must use Azure IoT Hub Connector v.3.0.x with v.8.5.x of the ThingWorx Platform and v.4.1.x with ThingWorx Platform versions 9.0.x, 9.1.x, and 9.2.x.

The eMessage Connector v.1.3.x will be maintained and updated as an old line of that Connector for the life of ThingWorx Platform version 8.5.x. However, fixes will be made available only in the v.2.2.x line of the Connector to support ThingWorx Platform v. 9.0.x, v.9.1.x, and v.9.2.x. Due to backward incompatibilities, you must use eMessage Connector v.1.3.x with v.8.5.x of the ThingWorx Platform and v.2.2.x with ThingWorx Platform versions 9.0.x and 9.1.x, and 9.2.x.