EnOcean releases several updates per year of the SmartServer IoT software to add new functionality, enhance performance, and fix reported problems. Due to high demand, the SmartServer IoT hardware is built in large production runs. As a result, when you purchase a SmartServer IoT, it may not come with the latest version of the SmartServer software. This page describes and provides download links for all the available SmartServer IoT software releases, with the current stable release followed by the most recent release at the top. If you receive a new SmartServer IoT, you can compare the software version in your SmartServer IoT to the current stable release identified below. To ensure you get the best performance and most stable operation, always update to the current stable release of the SmartServer software. See Determining SmartServer Software Version Compatibility before updating to verify compatibility for your update. See Warnings in the release notes on this page and in SmartServer Troubleshooting for additional use-case specific warnings.

Release Summary:

1 License
2 Current Stable Release
3 SmartServer 4.6 Update 4
4 SmartServer 4.6 Update 3
5 SmartServer 4.6 Update 2
6 SmartServer 4.6
7 SmartServer 4.5 Update 2
8 SmartServer 4.5 Update 1
9 SmartServer 4.5
10 SmartServer 4.4 Update 2
11 SmartServer 4.4
12 SmartServer 4.4 Beta
13 SmartServer 4.3 Update 2
14 SmartServer 4.3 Update 1
15 SmartServer 4.3
16 SmartServer 4.2 Update 1
17 SmartServer 4.2
18 SmartServer IoT 4.1 Update 1 Beta
19 SmartServer IoT 4.1 Beta
20 SmartServer IoT 4.0 Update 1
21 SmartServer IoT 4.0
22 SmartServer IoT 3.6 Update 6
23 SmartServer IoT 3.6 Update 5
24 SmartServer IoT 3.6 Update 4
25 SmartServer IoT 3.6 Update 3
26 SmartServer IoT 3.6 Update 2
27 SmartServer IoT 3.6
28 SmartServer IoT 3.5 Update 2
29 SmartServer IoT 3.5 Update 1
30 SmartServer IoT 3.5
31 SmartServer IoT 3.4 Update 3
32 SmartServer IoT 3.4
33 SmartServer IoT 3.3 Update 2
34 SmartServer IoT 3.3
35 SmartServer IoT 3.2 Update 5
36 SmartServer IoT 3.2 Update 4
37 SmartServer IoT 3.2 Update 3
38 SmartServer IoT 3.2 Update 2A
39 SmartServer IoT 3.2 Update 2
40 SmartServer IoT 3.2 Update 1
41 SmartServer IoT 3.2
42 SmartServer IoT 3.1 Update 3 Beta
43 SmartServer IoT 3.1
44 SmartServer IoT 3.0
45 SmartServer IoT 2.9
46 SmartServer IoT 2.8
47 SmartServer IoT 2.7 Update 1
48 SmartServer IoT 2.7
49 SmartServer IoT 2.6 Update 1
50 SmartServer IoT 2.6
51 SmartServer IoT 2.5 Update 2
52 SmartServer IoT 2.5 Update 1
53 SmartServer IoT 2.5
54 SmartServer IoT 2.4

License

The SmartServer software is subject to the terms and conditions described in the license available at Embedded Software License Agreement.

Certain components of the SmartServer software are subject to the terms and conditions described in the open source and third-party licenses available at Open Source and Third-Party License Terms.

Example software for SmartServer, SmartConnect, and SmartSupervisor is subject to the terms and conditions described in the license available at github.com/izot/smartserver-iot/blob/master/LICENSE.md.

Current Stable Release

Downloads for the current stable release (SmartServer 4.6 Update 4) are available here:

Descriptions and direct links for the current and previous releases are available in the following sections. Prior releases do not support all functionality of the current release. See Frequently Asked Questions for version-specific warnings for prior releases.

SmartServer 4.6 Update 4

Release Date: June 2, 2026

Versions:

SmartServer IoT Software: 4.60.030
SmartConnect: 4.60.030
SmartSupervisor: 4.60.030
SmartServer BACnet Stack (included with SmartServer IoT and SmartConnect): 2.0.60
IzoT Net Export Utility: 1.60.001
Platform
- Ubuntu Linux: 24.04
- Linux kernel: 6.8.12
- Node.js: 14
- Java VM: 11
- Python: 3.8
- PHP: 8.0
- Log4j: 2.17.1
- Jetty Web Server: 9.4.43
- NginX: 1.20.2
- PostgreSQL: 16.4
SmartServer IoT Hardware Compatibility: Model 72201R-240 or 72201R-248, Hardware Revision F (Quad Core ARM Processor) or later

Downloads:

Changes:

The following problem has been fixed:
- The SmartServer Manager Datapoints widget did not correctly handle writing negative values to Modbus registers. (AP-14217)

Warnings:

See Warnings for SmartServer 4.6.

SmartServer 4.6 Update 3

Release Date: April 20, 2026