# Licensing

## Licence for ogamma Visual Logger for OPC.

Licensing terms to use ogamma Visual Logger for OPC depend on the edition:

- Community Edition.

  - Free forever;

  - Can be used in commercial, personal, educational or other projects;

  - Does not include advanced features;

  - Have limits on number of OPC UA Servers to connect to (maximum 5), number of variables to log (up to 64) and number of variable groups (up to 5).

- Standard Edition.

  - Advanced features are enabled;

  - Number variables is limited to 1024, and no limits on number of OPC UA Server and variable groups.

- Enterprise Edition.

  - Advanced features are enabled;

  - No limits on number of OPC UA Server nor number of variables nor number of variable groups.

- Academic Edition.

  - Same as Enterprise Edition.

  - Provided for free to use in scientific-research and academic projects by universities and other government funded education and research organizations, as well as on projects performed by government organizations. If your project qualifies, contact Support to get the license activation key.

Note

Features and limitations of the Community Edition might change over time. Anyhow, once you download Community Edition distribution package of the ogamma Visual Logger for OPC, you can continue to use that version according to licensing terms included into that specific package. Next versions of Community Edition might have some features disabled or limited comparing to the Standard or Enterprise Editions or previous versions of Community Edition.

Note

Detailed licensing terms applicable for specific installation are available from the configuration GUI via menu `License/License Agreement`.

## Annual Maintenance and Upgrades License.

Starting from version 2.2.0, additionally to the main, regular license, described in the section above, valid `Annual Maintenance and Upgrades License` is required (furhter below referred as `AMU License`, or `AMUL`). Regular licenses include AMU License for one year period after the first activation of the application with that regular license’s activation code. New versions of the application released before expiration of the AMU License will run normally. Later releases will have disabled functionlity. Therefore, before upgrading to new versions please check if your installation has valid AMU License allowing to run that version of the application. History of releases can be found in Relase Notes document accessible from configuration GUI, menu `Help and Links / Release Notes`.

Expiration day is determined as the latest day defined in all installed AMU License files,

For more details about licensing, and to purchase AMU Licenses please contact Support.

For information about how to install the AMU License please refer section Upload Annual Maintenance and Upgrades License..

## Licenses of open source dependencies.

The SDK uses and depends on the following open source libraries according to their license terms:

- Boost. License: Boost Software License;

- Botan crypto library. License: BSD 2-Clause “Simplified” License;

- rapidjson, fast JSON parser/generator for C++ with both SAX/DOM style API. License is here;

- spdlog, very fast, header-only/compiled, C++ logging library. License: MIT;

- sqlite3. License: Public Domain;

- OpenSSL. Apache style license;

- restc-cpp (Modern C++ REST Client library). MIT License.

- librdkafka - the Apache Kafka C/C++ client library. License: https://github.com/edenhill/librdkafka/blob/master/LICENSE

- cppkafka: high level C++ wrapper for rdkafka. BSD 2-Clause “Simplified” License: https://github.com/mfontanini/cppkafka/blob/master/LICENSE

- UTF-8: A simple, portable and lightweight generic library for handling UTF-8 encoded strings.

- CPython (“traditional” implementation of Python):.

- paho-mqtt-c (Eclipse Paho C Client Library for the MQTT Protocol):

- paho-mqtt-c++ (Eclipse Paho C++ Client Library for the MQTT Protocol):