# HVAC KNX Library

### Documentation

<a href="/spaces/6G4WDUYxjH3a0to8hJov/pages/cef7399caa4236f2658da69b0d626ea46a29e811" class="button secondary" data-icon="books">To the documentation</a>

### Current version

<details>

<summary>1.2.3.5 - HVACKNX - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACKNX-1.2.3.5.compiled-library-v3" class="button primary" data-icon="arrow-down-to-line">Download</a></summary>

Release date 17.01.2026

**New features and changes**

* General improvement

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://dl.powerio.com/downloads/8c1463b5-02f2-427d-bd06-9e39d42fcbff-1.2.3.5-6756b4358d52.spdx.json">Link to the SBOM (spdx)</a></td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>6756b4358d52</code></td></tr></tbody></table>

</details>

***

### Older versions

<details>

<summary>1.2.3.3 - HVACKNX - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-HVACKNX-1.2.3.3.compiled-library-v3">Download</a></summary>

Release date 21.11.2025

**New features and changes**

* General improvement

***

*Technical details and security for download*

<table data-header-hidden><thead><tr><th width="292.62353515625"></th><th></th></tr></thead><tbody><tr><td><i class="fa-file-contract">:file-contract:</i> SBOM (Software Bill of Materials)</td><td><a href="https://dl.powerio.com/downloads/8c1463b5-02f2-427d-bd06-9e39d42fcbff-1.2.3.3-b79c15aa54a2.spdx.json">Link to the SBOM (spdx)</a></td></tr><tr><td><i class="fa-certificate">:certificate:</i> Signing</td><td>Yes (more info)</td></tr><tr><td><i class="fa-abacus">:abacus:</i> Signed library hash</td><td><code>b79c15aa54a2</code></td></tr></tbody></table>

</details>

<details>

<summary>1.2.3.2 - HVACKNX - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACKNX-1.2.3.2.compiled-library">Download</a></summary>

Release date 09.09.2025

**Bug fixes**

* DPD fix write telegram

</details>

<details>

<summary>1.2.3.0 - HVACKNX  - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACKNX-1.2.3.0.compiled-library">Download</a></summary>

Release date 08.07.2025

**Bug fixes**

* Bug fix initialization
* Adjustment write telegram
* Optimization write order

</details>

<details>

<summary>1.2.1.0 - HVACKNX - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACKNX-1.2.1.0.compiled-library">Download</a></summary>

Release date 14.03.2024

**Bug fixes**

* Performance optimization

</details>

<details>

<summary>1.2.0.0 - HVACKNX  - <a href="https://dl.powerio.com/downloads/powerIO-CODESYS-3.5.17.2-HVACKNX-1.2.0.0.compiled-library">Download</a></summary>

Release date 12.07.2023

**New features and changes**

* New read function blocks

</details>

### Demo project

HVAC KNX demo project - [Download](https://dl.powerio.com/downloads/HVAC-KNX-Library-Demoproject.project)

### Details


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