# Deprecated functionality Deprecated features are features that iotagent-node-lib stills support but that are not maintained or evolved any longer. In particular: - Bugs or issues related with deprecated features and not affecting any other feature are not addressed (they are closed in github.com as soon as they are spotted). - Documentation on deprecated features is removed from the repository documentation. Documentation is still available in the documentation set associated to older versions (in the repository release branches). - Deprecated functionality is eventually removed from iotagent-node-lib. Thus you are strongly encouraged to change your implementations using iotagent-node-lib in order not rely on deprecated functionality. A list of deprecated features and the version in which they were deprecated follows: - Config `mongodb.*` different from `mongodb.uri` (and associated env vars `IOTA_MONGO_*` except `IOTA_MONGO_URI`) in 4.11.0 (finally removed in 4.14.0) - Support to NGSI v1 (finally removed in 2.18.0) - Support to Node.js v4 in iotagent-node-lib 2.8.1 (finally removed in 2.9.0) - Support to Node.js v6 in iotagent-node-lib 2.9.0 (finally removed in 2.10.0) - Support to Node.js v8 in iotagent-node-lib 2.12.0 (finally removed in 2.13.0) - Support to Node.js v10 in iotagent-node-lib 2.15.0 (finally removed in 2.16.0) - Support to Node.js v12 in iotagent-node-lib 2.24.0 (finally removed in 2.25.0) - Support to Node.js v14 in iotagent-node-lib 3.0.0 (finally removed in 3.1.0) - Support to Node.js v16 in iotagent-node-lib 4.9.0 (finally removed in 4.10.0) - Support to Node.js v18 in iotagent-node-lib 4.9.0 (finally removed in 4.10.0) - Support to NGSI-LD v1.3 in iotagent-node-lib 2.25.0 (finally removed in 2.26.0) - Support groups (provision) statically defined by configuration - Support to in-memory registry (i.e.`deviceRegistry.type=memory`) - eventType configuration (finally removed in 3.0.0) - Support to legacy expressions (finally removed in 3.2.0) - Bidirectinal pluging (finally removed in 3.4.0) - appendMode configuration (`IOTA_APPEND_MODE` env var) (finally removed in 3.4.0) - `config.stats` section, and push-mode statistics. - Services API routes (`/iot/services`) in favor of the `/iot/groups`. Both are still supported, but the former is deprecated. The use of Node.js v14 is highly recommended. ## Using old iotagent-node-lib versions Although you are encouraged to use always the newest iotagent-node-lib version, take into account the following information in the case you want to use old versions: - Code corresponding to old releases is available at the [iotagent-node-lib GitHub repository](https://github.com/telefonicaid/iotagent-node-lib). Each release number (e.g. 2.7.0 ) has associated the following: _ A tag, e.g. `2.7.0`. It points to the base version. _ A release branch, `release/2.7.0`. The HEAD of this branch usually matches the aforementioned tag. However, if some hotfixes were developed on the base version, this branch contains such hotfixes. - Documentation corresponding to old versions can be found at [readthedocs.io](https://iotagent-node-lib.readthedocs.io). Use the panel in the right bottom corner to navigate to the right version. The following table provides information about the last iotagent-node-lib version supporting currently removed features: | **Removed feature** | **Last iotagent-node-lib version supporting feature** | **That version release date** | | -------------------------------------------------------------- | ----------------------------------------------------- | ----------------------------- | | NGSI v1 API | 2.17.0 | August 30th, 2021 | | Support to Node.js v4 | 2.8.1 | December 19th, 2018 | | Support to Node.js v6 | 2.9.0 | May 22nd, 2019 | | Support to Node.js v8 | 2.12.0 | April 7th, 2020 | | Support to Node.js v10 | 2.15.0 | February 18th, 2021 | | Support to Node.js v12 | 2.24.0 | September 2nd, 2022 | | Support to Node.js v14 | 3.0.0 | March 30th, 2023 | | Support to Node.js v16 | 4.9.0 | August 22nd, 2025 | | Support to Node.js v18 | 4.9.0 | August 22nd, 2025 | | Support to NGSI-LD 1.3 | 2.25.0 | January 24th, 2023 | | eventType configuration | 2.26.0 | March 15th, 2023 | | Support to Legacy Expressions | 3.1.0 | April 25th, 2023 | | bidirectional plugin | 3.3.0 | August 24th, 2023 | | appendMode configuration (`IOTA_APPEND_MODE` env var) | 3.3.0 | August 24th, 2023 | | push-mode stats | 4.5.0 | June 11th, 2024 | | config `mongodb.host` (env var `IOTA_MONGO_HOST`) | 4.13.0 | February 4th, 2026 | | config `mongodb.port` (env var `IOTA_MONGO_PORT`) | 4.13.0 | February 4th, 2026 | | config `mongodb.db` (env var `IOTA_MONGO_DB`) | 4.13.0 | February 4th, 2026 | | config `mongodb.replicaSet` (env var `IOTA_MONGO_REPLICASET`) | 4.13.0 | February 4th, 2026 | | config `mongodb.user` (env var `IOTA_MONGO_USER`) | 4.13.0 | February 4th, 2026 | | config `mongodb.password` (env var `IOTA_MONGO_PASSWORD`) | 4.13.0 | February 4th, 2026 | | config `mongodb.authSource` (env var `IOTA_MONGO_AUTH_SOURCE`) | 4.13.0 | February 4th, 2026 | | config `mongodb.retries` (env var `IOTA_MONGO_RETRIES`) | 4.13.0 | February 4th, 2026 | | config `mongodb.retryTime` (env var `IOTA_MONGO_RETRY_TIME`) | 4.13.0 | February 4th, 2026 | | config `mongodb.ssl` (env var `IOTA_MONGO_SSL`) | 4.13.0 | February 4th, 2026 | | config `mongodb.extraArgs` (env var `IOTA_MONGO_EXTRAARGS`) | 4.13.0 | February 4th, 2026 |