# Firmware update date and version function description

**New Version: 1.2.8**

**Date**: 2024/08/29\
**Improvements**:

* Resolved bug related to **mid-little endian** data format processing.

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**New Version: 1.2.7**

**Date**: 2024/07\
**Improvements**:

* Corrected storage issues with **temperature calibration parameters**.
* Fixed display unit inconsistencies in **heat data output**.

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**New Version: 1.2.6**

**Date**: 2024/07\
**Improvements**:

* Added support for **Modbus RTU function code 04**, enabling single-register read commands.
* Introduced functionality for **heat energy calculation, communication, and display**.
* Implemented a new **temperature calibration feature**.

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**New Version: 1.2.5**

**Date**: 2024/05\
**Improvements**:

* Enhanced **Modbus RTU endian format options**, adding support for **mid-little endian** and **mid-big endian** configurations.

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**New Version: 1.2.4**

**Date**: 2024/04\
**Improvements**:

* Introduced new **Modbus RTU endian configuration**, including **little endian** format.
* Added **Modbus RTU byte format settings**, providing greater flexibility in data structuring.

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**New Version: 1.2.3**

**Date**: 2024/01\
**Improvements**:

* Removed support for RS485 baud rates of **300 bps** and **600 bps**.
* Added RS485 baud rate options for **38,400 bps** and **57,600 bps** to accommodate modern communication demands.

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**New Version: 1.2.2**

**Date**: 2023/06\
**Improvements**:

* Introduced **Modbus function code 1602**, enabling RS485 to return **temperature readings**.