# Changelog
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

Types of changes:

 * Added (for new features)
 * Changed (for changes in existing functionality)
 * Deprecated (for soon-to-be removed features)
 * Removed (for now removed features)
 * Fixed (for any bug fixes)
 * Security (in case of vulnerabilities)

## [v1.8.1] 09-08-2022
Fixed:

- Application freezes when reading non-terminated serial string from device.

## [v1.8.0] 26-04-2022
Added:

- PRODUCT_NAME and VENDOR_NAME id's added to the protocol.

Fixed:

- DEVICE_NAME request reply with PRODUCT_NAME
- DEVICE_NAME and SERIAL read from empty EEPROM resulted in application crash.

## [v1.7.2] 09-03-2022
Added:

- Microcontroller resets GSM module on startup.
- UC20 and EG25 GSM Module support

Changed:

- factory reset after holding CONN switch for 5 sec. instead of 15 sec.

Fixed:

- Storage module crashed when eeprom is empty, on first time boot.

## [v1.7.1] 04-03-2022
Changed:

- CHANGELOG file newest release at the top of the file
- log messages contain internal timestamp (ms)
- internal timer library completely redesigned, stable

Added:

- Internal buffer for AT commands send to GSM module
- Initilize GSM module based on model recognition (UC20 and EG25 supported now)
- 4G (VoLTE) connection is handled correctly now

Fixed:

- Sending AT commands to GSM Module before receiving RDY results in error responses

## [v1.7.0] 15-02-2022
Changed:

- version is now formatted as symantic versioning

## [v1.6.286.0] 16-05-2018
Fixed:  

- Serial number reading from empty EEPROM results in crash of PC application.  

Added:  

- Factory reset: Holding down the [CONNECT] button on the front for at least 15sec (Connect LED flashes 3x).  

## [v1.5.226.0] 20-04-2018
Changed:

- Complete redesign of the internal communication protocol. Stability improvement.

Added:

- GSM Hybrid can operate standalone now without PC software. (all settings are stored internally).

## [v1.5.150.0] 30-03-2018
Fixed:

- Minor bug fixes

## [v1.5.130.0] 30-03-2018
Fixed:

- Heavy USB traffic possibly causes connection lost over some time (days).  

## [v1.4] 03-08-2017
Fixed:

- Initiate a call does not always work.

## [v1.3] 30-01-2017
Fixed:

- Incoming call is sometimes rejected by pressing the Connect(Ring/hook) button.

## [v1.2] - 07-09-2016
Fixed:

* Device stopped working after some time (stack overflow due to too large USB HID report size)

Added:

* Alert feature: Reporter can alert studio by pressing the '0' on his phone when having an active connection.

** NOTE: This firmware will only work with GSM Hybrid Control software V2 or above. **

## [v1.1] - 10-08-2016
Added:

* D&R serial number storage in EEPROM. (format: yymmddnnvv)
	yy = year
	mm = month
	dd = day
	nn = index number
	vv = hardware revision
* Device alias name storage in EEPROM. (ex. "Tel Hybrid 1")

## [v1.0] - 18-07-2016    
Initial release