> For the complete documentation index, see [llms.txt](https://support.powerio.com/hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.powerio.com/hub/downloads/en/powerio-downloads/t1.b100-firmware.md).

# T1.B100

<figure><img src="/files/cfb3aa3dabc9c3ac4c870a9c5c62c5e571fccf36" alt="" width="375"><figcaption><p>T1.B100 powerIO Box</p></figcaption></figure>

### Current version - Firmware

<details>

<summary>5.0 - Firmware - <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-5.0.piop">Download</a></summary>

Release Date 22.07.2026

**New features and changes**

#### **Security**

* **Signed firmware packages**: Firmware updates (PIOP) have been signed since version 5.0 and are checked on the device before installation. Packages without a valid signature are rejected.
* **API keys for external systems**: Access to the device API via individually assignable and revocable API keys, without passwords in scripts or configuration files.

#### **Serial communication and Modbus**

* **Optimized Modbus communication**: Interframe timing according to the Modbus specification and fixing a race condition for even more stable parallel queries.

#### **powerIO Orbit connectivity (optional)**

* **powerIO Orbit connectivity**: Improved and more stable connection to powerIO Orbit with encrypted transmission.

**Bug fixes**

* **Onboard I/Os**: The onboard I/Os are reliably available again after restarting the API service.
* **Password reset code**: Security improvement in the generation of the password reset code.
* **Time server fallback**: Fallback to alternative time servers if the configured NTP server is unreachable.
* **Firmware upload**: Improved error handling when uploading firmware packages in the web interface.
* Bug fixes in the web interface and updates to system components

</details>

***

### Current version - Bootloader

{% hint style="info" %}
With Bootloader < 0.8, startup problems may rarely occur after updates; turning it off and on again fixes this, and the restart can take several minutes\
\
The bootloader file can be installed independently of the firmware.
{% endhint %}

<details>

<summary>0.8 - Bootloader <a href="https://dl.powerio.com/downloads/powerIO-t1b100-bootloader-0.8.piop">Download</a></summary>

Release Date 08.09.2025

**Bug fixes and improvements**

* For Bootloader versions < 0.8, in rare cases after a firmware update the system may fail to start. If this happens, it is necessary to switch it off and on again. This startup can take several minutes, because the update is carried out again here.\
  \
  With this version, this error has been fixed. The bootloader file can be installed independently of the firmware.

</details>

***

### Older versions - Firmware

<details>

<summary>4.4 - Firmware - <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-4.4.piop">Download</a></summary>

Release Date 12.09.2025

**Bug fixes and improvements**

* Full versioning

{% hint style="success" %}
For a detailed changelog, see version 4.3
{% endhint %}

</details>

<details>

<summary>4.3 - Firmware</summary>

Release Date 08.09.2025

**Bug fixes and improvements**

#### **Security**

* **HTTPS encryption** - Can optionally be activated with automatic certificates and custom certificates.
* **Flexible access control** - HTTP, HTTPS and SSH configurable individually.

**Serial communication and Modbus**

* **Modbus speed 3x -** Thanks to buffer optimization, Modbus RTU queries are up to 3x faster! Depending on the connected Modbus device and baud rate.
* **Automatic reconnection** - Automatic recovery after connection drops.
* **Parallel query optimization (Serial)** - Queries are now performed fully in parallel per port.

**powerIO Portal connectivity (optional)**

* **powerIO Portal connectivity -** Preparation for powerIO Portal integration with encrypted transmission.
* **powerIO Portal device registration -** Registration of powerIO devices for support purposes and device assignment.

**Optimizations**

* **Reduced memory usage** - 15% less RAM usage in idle operation.
* **Automatic recovery** - Crashed services restart automatically - the system continues running without intervention.

**Bug fixes**

* **DNS server applications** - Applications now receive DNS server changes without the application needing to be restarted
* **Memory leak fixes** - In rare cases memory leaks occurred; this has been fixed through better thread handling.
* **Fix for long restart times** - When a restart was performed, it could take up to 100 seconds before it was triggered.
* Bug fixes in the web interface and correction of typos

</details>

<details>

<summary>4.2 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-4.2.piop">Download</a></summary>

Release Date 24.03.2025

**Bug fixes and improvements**

* **WLAN dongle feature extension**- Network usage possible in Network mode or Application mode.
* **Expanded Modbus functionality** - Faster port scanning and customizable timeout settings added.
* **Automatic activation of software packages** - Software is activated after installation without manual intervention.
* **Improved system stability** - File system checks and optimized container management implemented.
* **Faster system startup** - Optimized execution methods reduce startup time and memory usage.
* **Expanded Modbus log data** - Client source information added to trace data for better debugging.
* **Bug fix for package installation** - Problems fixed and installation process stabilized.

</details>

<details>

<summary>4.1 - Firmware</summary>

Release Date 31.01.2025\
WARNING: Critical bug - Modbus timeout fixed at 50ms - use a newer version!

**Bug fixes and improvements**

* Compatibility for internal application restored by updated dependency package.

</details>

<details>

<summary>4.0 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-4.0.piop">Download</a></summary>

Release Date 28.01.2025

**Bug fixes and improvements**

* Updated [Modbus stack](/hub/en/t1.b100/feldbus-protokolle/modbus.md#besonderheiten), with automatic list handling and optimized performance
* Additional functions such as [Modbus Trace Log](/hub/en/t1.b100/feldbus-protokolle/modbus.md#modbus-log) for error analysis
* Addition of the [Modbus Test](/hub/en/t1.b100/feldbus-protokolle/modbus.md#modbus-test) to include missing FCs and extended data types
* Extension to[ use serial ports in user applications](/hub/en/t1.b100/feldbus-protokolle/application.md#auswahl-fur-application-modus) to be able to.

</details>

<details>

<summary>3.22 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.22.piop">Download</a></summary>

Release Date 14.11.2024

**Bug fixes and improvements**

* Bug fix for restarting. In some situations, the restart was not performed when it was triggered via the web interface.

</details>

<details>

<summary>3.21 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.21.piop">Download</a></summary>

Release Date 10.09.2024

**Bug fixes and improvements**

* Bug fix of a dependency package for serial-transparent mode

**Info**\
\
If firmware version 3.20 was previously used and there is not enough storage space, the application "Internal Stack - Transparent mode" must be restarted.

<img src="/files/a7d7add0574e9fbf37559242c3c8ed582b1cd93c" alt="" data-size="original">

</details>

<details>

<summary>3.20 - Firmware</summary>

Release Date 04.09.2024

**Info**

*Please use firmware version 3.21. This version fixes a critical issue that occurred in version 3.20. This change affects only the T1.B100 device.*

**New features and changes**

* Performance optimization: The core functions were integrated into the main software, resulting in improved system performance.

**Bug fixes and improvements**

* The network connection at system startup was improved to avoid interruptions.
* A problem with updating configuration files was fixed, so version information is now always displayed correctly.
* A problem with the NTP client was fixed to ensure more accurate system time.
* The Modbus integration was improved to reduce interruptions during system changes.
* Log file management was optimized to better use system resources.
* LTE stability improvements

</details>

<details>

<summary>3.10 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.10.piop">Download</a></summary>

Release Date 15.05.2024

**Bug fixes and improvements**

* Improvement in log recording and bug fix for a background service

</details>

<details>

<summary>3.9 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.9.piop">Download</a></summary>

Release Date 08.05.2024

**New features and changes**

* Wi-Fi dongle support for new powerIO v2 app
* After uploading software packages, the user interface now updates itself to show you the unpacking progress.
* The handling of the mobile app has been improved through extended session and authentication options.
* New settings in log file management mean that only relevant warning messages are now displayed, which increases clarity.\\

  <figure><img src="/files/022e661c4e79054a9082a30d548632275317bd5b" alt=""><figcaption></figcaption></figure>

**Bug fixes and improvements**

* We have added a network bridge to ensure that your network connections are maintained even during power outages.
* Access logs for certain API paths are now no longer stored, which protects your data even better.
* Settings for logging and log rotation have been optimized to improve system performance and use storage space more efficiently.

</details>

<details>

<summary>3.8 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.8.piop">Download</a></summary>

Release Date 22.12.2023

**New features and changes**

* Preparation for the new BACnet fieldbus protocol
* Stability improvement during system startup

**Bug fixes**

* Previously, when network settings were changed, the change was applied to all network interfaces. As a result, in the case of two network interfaces, an unaffected change led to very brief flickering.
* When uploading large applications, a timeout was shown even though there was no timeout.
* After uploading an application, the status no longer remains at 100% during unpacking. Instead, the user is shown that the application is being prepared. After that, the application can be installed as usual.

</details>

<details>

<summary>3.7 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.7.piop">Download</a></summary>

Release Date 06.11.2023

**New features and changes**

* Fast reconnection after connection loss without modem teardown
* Add package information for additional user apps

**Bug fixes**

* Modem drops the connection and can no longer reconnect
* Signal strength could occasionally not be retrieved
* Modem improvements - reconnect in different states.

</details>

<details>

<summary>3.6 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.6.piop">Download</a></summary>

Release Date 10.10.2023

**Bug fixes**

* Gateway can only be set when switching between DHCP and static
* Security patches for dependency packages

</details>

<details>

<summary>3.4 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.4.piop">Download</a></summary>

Release Date 22.08.2023

**Bug fixes**

* Fixes the error where IPv6 is used instead of IPv4 for an LTE connection, even though this is stored as the preferred setting.

</details>

<details>

<summary>3.3 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.3.piop">Download</a></summary>

Release Date 17.08.2023

**New features and changes**

* Unified web interface for all powerIO devices
* Preparations for LTE modem as an expansion card

</details>

<details>

<summary>3.2 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.2.piop">Download</a></summary>

Release Date 31.07.2023

**New features and changes**

* Visual feedback when threshold values for storage usage are exceeded.

  <div align="left"><figure><img src="/files/d9e27cbbb54752627da8fc6c598b7d46b7a342a9" alt="" width="375"><figcaption><p>Threshold monitoring of system values</p></figcaption></figure></div>
* Visual feedback when threshold values for relevant performance data are exceeded.\\

  <div align="left"><figure><img src="/files/4584114028378efc9aa15e19ce76cd3bcb7069ec" alt="" width="375"><figcaption><p>Threshold monitoring of current values</p></figcaption></figure></div>
* Cross-page global "Advanced Mode" for an expanded view of information.\\

  <div align="left"><figure><img src="/files/abd73cdf6a95555143739b2db7c50e50b92400a0" alt=""><figcaption><p>Activation/deactivation of "Advanced Mode"</p></figcaption></figure></div>
* Additional log information added to the "Diagnostic File".
* Display of the version limited to "Firmware Version", as this is the only relevant version for the end user.
* Installed user applications that redirect to an application website are marked with a "Link" icon.\\

  <div align="left"><figure><img src="/files/47bc9905547ae2650b5b27162bd2684c44f277ec" alt="" width="249"><figcaption><p>Buttons with "Link" and "Settings"</p></figcaption></figure></div>

**Bug fixes**

* In a critical error state, e.g. due to a kernel panic, an automatic restart takes place.
* Bug fix for logging requests from the Device Manager.
* Active tabs under user applications are now highlighted.\\

  <div align="left"><figure><img src="/files/4cc8a4591b38510046f8c3a17b217f7b5148e34a" alt="" width="375"><figcaption><p>Active TAB display</p></figcaption></figure></div>
* Buttons under "Extended Port" are now in a consistent style.
* A display error during active "Firmware Updates" has been fixed.

</details>

<details>

<summary>3.1 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-t1b100-firmware-3.1.piop">Download</a></summary>

Release Date 01.07.2023

**New features and changes**

* Support for new user applications
* If applications are in the Uploaded area and are installed, they are retained during subsequent firmware updates (Backup & Restore).
* Installed applications are now displayed dynamically in the navigation bar. Different configurations can be made here depending on the application.
* Configuration files of applications, e.g. CODESYS, can be edited in the integrated file explorer.
* Adjustment of the dashboard web interface with additional information
* Parallel upload of applications possible
* Preparations for support of an expansion card for an LTE modem.
* Prevent downgrades of user applications. The package must first be uninstalled. Then an older version can be installed.
* Extensions for remote update with the Device Manager

**Bug fixes**

* Bug fix for connection of expansion cards
* Stability improvement of the UPS
* Stability improvement of the measured values for 24-volt power supply
* Bug fix in target device selection. From firmware >= 3.0, only matching firmware versions can be installed for the respective target system.
* Fix for a display error in the Modbus Test overview (date was displayed incorrectly).
* Prevent simultaneous installation processes, which could previously lead to a conflict.
* Missing timestamps in the diagnostic file have been added
* Security patches for dependency packages

</details>

<details>

<summary>2.22 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-b1-firmware_v2.22.piop">Download</a></summary>

Release Date 05.12.2022

**New features and changes**

* Number of connectable devices per serial port increased from 10 participants to 32 participants.

</details>

<details>

<summary>2.21 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-b1-firmware_v2.21.piop">Download</a></summary>

Release Date 06.04.2022

**New features and changes**

* Number of connectable devices per serial port increased from 4 participants to 10 participants.
* Diagnostic file can now be downloaded under *Settings -> Diagnostic* can be downloaded.

  ![](/files/a20374ff863ff93efc31dff0b51b5cb5c837861f)
* The diagnostic file is for evaluation of error diagnostics by powerIO support. The file cannot be evaluated by the user themselves.

**Bug fix**

* Restart on power failure optimized.

</details>

<details>

<summary>2.20 - Firmware <a href="https://dl.powerio.com/downloads/powerIO-b1-firmware_v2.20.piop">Download</a></summary>

**New features and changes**

* LED test added on diagnostic page.

**Bug fix**

* Stability improvements during firmware update.

</details>


---

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