# Changelog
## Develop
- Change license year to 2022
- MQTT: Improve module implementation
- MQTT: Add optional SSL connection type
- MQTT: Add cayenne async demo, publish-mode only through ring buffer
- MQTT CAYENNE: Completely reworked with asynchronous MQTT instead. Improves performance to transmit more data in one shot
- MQTT client: Add poll periodic event for event callback
- Port: Improve ThreadX port
- CONN: Enable manual TCP receive by default, to improve system stability
- Timeout: module returns ERRMEM if no memory to allocate block
- Add esp_at_binaries from Espressif, used for library verification (official AT firmware)
- Add optional `AT+CMD?` command at reset/restore process, for debug purpose for the moment, only
- Add function to get ESP device used for AT command communication
- Fix `lwesp_get_min_at_fw_version` to return min AT version for detected ESP device
- SNTP: Improve module comments, change timezone variable to `int16_t`
- SNTP: Implement global callback when command is to obtain current time
- SNTP: Add synchronization interval config, available with ESP AT `2.3.0` or later (ESP32-C3 only for the moment)
- SNTP: Add option for readin current SNTP configuration
- SNTP: Add option to automatically read SNTP data on `+TIME_UPDATED` event (requires ESP-AT v3.x or newer)
- ERR: Add option to get response to `ERR CODE:` message if command doesn't exist and put it to result of command execution
- Fix min at version for ESP32 to `2.2.0`
- Add `LWESP ` prefix for debug messages
- Update code style with astyle
- Add `.clang-format` draft - remove astyle support
- SSL: Added experimental support
- FS: Added support for erase and write operation
- Code improvement: Change multiple local variables to single structure
- Date&Time `lwesp_datetime_t` and use generic `struct tm` instead
- CONN: Add validation counter to ensure netconn object matches connection object and that there was no connection close/re-open in between
- Minimum supported AT version is now `v3.2.0 (ESP32, ESP32-C3)` to support new MFG write operations
- Added support for `ESP32-C2` and `ESP32-C6` AT commands
- SYSFLASH: Split System flash and Manufacturing data to separate commands, following new breaking changes for ESP-AT firmware
- WPS: Break API compatibility to configure the feature, by adding minimum security level parameter in the `lwesp_wps_set_config` function
## 1.1.2-dev
- Add POSIX-compliant low-level driver (thanks to community to implement it)
- Prohibit transmission of too long UDP packets (default), can be disabled with configuration option
- Split CMakeLists.txt files between library and executable
- Move `esp_set_server` function to separate file `lwesp_server.c`
- Use `AT+GMR` command just after reset/restore to determine ESP device being connected on AT port
- Minimum required AT binaries are now `2.3.0` for `ESP32/ESP32C3` and `2.2.1` for `ESP8266`
- Connection status is acquired with `AT+CIPSTATE` or `AT+CIPSTATUS`, depends on Espressif connected device
- Add optional full fields for access point scan with `LWESP_CFG_ACCESS_POINT_STRUCT_FULL_FIELDS` config option
- Add optional keep-alive periodic timeout to system event callback functions. Can be used to act as generic timeout event
- Improve station manager snippet with asynchronous mode
## v1.1.1-dev
- Update to support library.json for Platform.IO
## v1.1.0-dev
- Add support for SDK v2.2
- Extend number of information received on AP scan
- Add option for `WPA3` and `WPA2_WPA3_PSK` authentication modes
- Add bgn and wps readings
- Add support for IPv6
- Add option to disconnect all stations from Soft-AP
- TODO: Add DNS for IPv6 support (Optional)
- TODO: Add support for WIFI GOT IP to parse IPv6
- Update CMSIS OS driver to support FreeRTOS aware kernel
## v1.0.0
- First stable release
- Works with *esp-at* version `v2.1.0`
- Implements all basic functionality for ESP8266 and ESP32
- Added operating system-based sequential API
- Other bug fixes and docs updates
## v0.6.1
- Fixed inadequate MQTT RX data handling causing possible overflow of memory
- Added support for zero-copy MQTT RX data
## v0.6.0
- Added support for ESP32 & ESP8266
- Official support for ESP32 AT firmware v1.2 & ESP8266 AT firmware v2.0
- Added examples to main repository
- Preparation for BLE support in ESP32
- Removed AT commands with `_CUR` and `_DEF` suffixes
- Renamed some event names, such as `ESP_EVT_CONN_CLOSE` instead of `ESP_EVT_CONN_CLOSED`
- Added DHCP/static IP support
- Added CMSIS-OS v2 support
- Added LwMEM port for dynamic memory allocation
- Other bug fixes
## v0.5.0
- Remove `_t` for every struct/enum name
- Fully use ESP_MEMCPY instead of memcpy
- When connection is in closing mode, stop sending any new data and return with error
- Remove `_data` part from event helper function for connection receive
- Implement semaphores in internal threads
- Add driver for NUCLEO-F429
- Implement timeout callback for major events when device does not reply in given time
- Add callback function support to every API function which directly interacts with device
- Replace all files to CRLF ending
- Replace `ESP_EVT_RESET` to `ESP_EVT_RESET_DETECTED`
- Replace `ESP_EVT_RESET_FINISH` to ESP_EVT_RESET`
- Replace all header files guards with ESP_HDR_ prefix
- Add espERRBLOCKING return when function is called in blocking mode when not allowed
- Other bug fixes to stabilize AT communication
## v0.4.0
- Add sizeof for every memory allocation
- Function typedefs suffix has been renamed to `_fn` instead of `_t`
- Merge events for connection data send and data send error
- Send callback if sending data is not successful in any case (timeout, ERROR, etc)
- Add functions for IP/port retrieval on connections
- Remove goto statements and use deep if statements
- Fix MQTT problems with username and password
- Make consistent variable types across library
## v1.3.0
- Rename all cb annotations with evt, replacing callbacks with events,
- Replace built-in memcpy and memset functions with `ESP_MEMCPY` and `ESP_MEMSET` to allow users to do custom implementation
- Added example for Server RTOS
- Added API to unchain first pbuf in pbuf chain
- Implemented first prototype for manual TCP receive functionality.
## v0.2.0
- Fixed netconn issue with wrong data type for OS semaphore
- Added support for asynchronous reset
- Added support for tickless sleep for modern RTOS systems
## v0.1.0
- Initial release