EasyTerm FW changelog

Version 3.1.0 (15.07.2026)


Features
  • Re-implementation of HMI(GUI) functionality for much more efficient RAM usage. Much more memory is now available to Python interpreter.
  • Add larger fonts (28, 36 and 44 pixels height) via use of upscaling
  • Show temporary text "Empty screen #n" on LCD when there is no widget displayed so user can get oriented on which screen page he is currently located
  • Widget count is no longer limited to 80 and count depends just on memory usage (widget parameter lengths etc...)
  • Listing widgets with List... command returns also commands that were called (executed) to display such widgets
  • Add tick parameter to SYS command for timing debug purposes
  • Improve keypad layout, add these missing symbols: %, ^, ` and \
API changes
  • Larger fonts options
  • List commands contain log of commands that were used to display/edit widget
  • Tick parameter to SYS command
Bugfixes
  • Fix plot widgets edit operations
  • Fix layout storage of text widgets
  • Fix log window widget line wrap
  • Fix critical error message rendering on LCD
  • Several reliability bug fixes

Note
Many thanks to Ladislav Török for tips related to manual and keypad improvements and Martin Hubáček for tips on Empty screen labels and bigger fonts.

Version 3.0.4 (07.04.2026)

Bugfixes
  • Fix of I2C bug introduced by FW v3.0.3 (in write-read sequence with repeated start condition - I2C WRRD command - false detection of stucked bus). All devices with v3.0.3 shall be updated.

Note
  • Please do not use latest STM32CubeProgrammer (v2.22.0) for updating FW. It seems to be broken for DFU updates. All prior versions (v2.21.0 and older) seems to work fine.

Version 3.0.3 (01.04.2026)

Bugfixes
  • Fix I2C bus unblocking (was using incorrect pin as SCL), improve address scan and add bus unblock feature to it
  • I2C bus unblocking to be performed prior to I2C operation (not after)
  • Increase buffer size for Python code block parser (larger code blocks allowed)
  • Fix bug where periodically executed Python scripts via timer may have caused recursion
  • Several critical errors with descriptions are now displayed via LCD screen
  • Fix SaveLayout/LoadLayout/ListLayoutBanks commands help reply text (0-5 is valid bankId range, not 0-4)

Version 3.0.2 (18.12.2025)

  • Fix image file object not closed after displayed (FAT lock)
  • Fix Python script parsing (bug in escape chars processing)

Version 3.0.1 (9.11.2025)

Hotfixed version v3.0.0
  • Handle GUI renderer and other background tasks also during Python code block execution (if:..., for: ... etc.)
  • Fix LogWin line wrapping calculation (caused text overflow in certain case)
  • Increase HTTP GET timeout to 5s from 2s
  • Increase buffer for Python code block loader

Version 3.0.0 (5.11.2025)

Features
  • Add Python support with Python REPL mode and Python script upload/execution feature
  • Add several custom Python functions related to EasyTerm usage (see manual)
  • Improve image and script storage management
  • Increased permitted filename length to 32 characters
  • Add more descriptive messages for several WIFI error states (WIFI may not be initialized, WIFI may be in sleep etc...)
  • Check if WIFI module is awake prior executing wake routine with reset (to spare time)
  • WIFI wake now automatically tries to recover MQTT broker connection in blocking manner (better for scripting purposes where MQTT commands follows)
  • Add stack/heap usage analyzer and better SYS printMemoryInfo output
  • Do not reconnect to MQTT broker automatically on manual AP reconnection command
  • Optimized RAM usage
API changes
  • Image file management related API changes to be consistent with new Python file management commands
  • Add Python-related commands
Bugfixes
  • Fix prevention of screen page change (via buttons) when action selection menu is displayed
  • Fix ConnectMqttBroker command timeouts and wait for WIFI module "busy" state to be cleared (e.g. is reconnecting to AP)
  • Improve WIFI/MQTT functionality reliability
  • Fix processing of invalid parse mask format

Version 2.3.3 (6.10.2025)

Hotfixed FW v2.3.2 release
  • -
API changes
  • -
Bugfixes
  • ADC sample rate switching bug/regression and accuracy fix

Version 2.3.2 (1.10.2025)

Features
  • -
API changes
  • DisplayGraphics overlayColor changed to outlineColor
Bugfixes
  • Fix color parser buffer overflow when using long command format
  • Fix GPIO configuration readout text (API inconsistency)
  • Fix PushButtons configuration readout
  • Fix configuration of command text color for LogWin widget
  • Fix ADC sample rate reconfiguration (HW) when user requests ADC interface conversions with high sample rates
  • Fix - stop ongoing DAC continuous/oneShot conversions when user wants to change DAC to constant voltage conversion
  • Fix LCD wakeup routine

Version 2.3.1 (23.06.2025)

Features
  • -
API changes
  • -
Bugfixes
  • Fixes/improvements for internal purposes (release not published)

Version 2.3.0 (21.04.2025)

Features
  • MQTT messages via remote control are mirrored to HOST UART by default (can be disabled using SYStem command)
  • Try to publish not yet published remote control replies before entering WIFI sleep
  • Improved WIFI error handling
  • Add WIFI module wakeup method without need to connect EN signal via cable (!needs WIFI module FW >=4.2!)
  • Add PERSIST_SESSION parameter to ConnectMqttBroker command (ideal low-power capability with MQTT communication with periodic WIFI sleep)
  • Add QOS parameter to RemoteControlTopics command (ideal low-power capability with MQTT control with periodic WIFI sleep)
  • GPIO command parameters like PinPull, OutputState and OutputType are processed even when GPIO is in unrelated Mode (disabled etc...) thus allowing to be pre-configured prior Mode change to prevent transient glitch due to improper GPIO initialization order
  • Improved WIFI error handling
  • Add WIFI debug mode via specific commands
  • Add automatic MQTT broker reconnect after WIFI sleep (and remote control resubscription when PERSIST_SESSION was disabled)
  • Add PrintScreenImage command
API changes
  • Refactor several SYStem command parameters for API consistency
  • Add PrintScreenImage command
Bugfixes
  • Fix MQTT flow
  • Fix not hanlder acknowledgeDisable and errorsDisable parameters
  • Bugfix of not setting (ignored) MQTT client ID parameter

Version 2.2.1 (31.01.2025)

Features
  • Improve listScreenPage behaviour and format of replied info
  • Inform user when the response buffer has overflowed
API changes
  • Removed obsolete and non-documented object commands
Bugfixes
  • Fix allowed screenPage range in command parsing or help printouts

Version 2.2.0 (18.12.2024)

Features
  • Add z parameter to image/graphics widgets for more convenient stacking in z-axis
  • Disable remote control/reply in case of WIFI module sleep or non-responding errors preventing timeout lockup
  • Automaticaly recover remote control MQTT settings on WIFI module sleep exit (wakeup)
API changes
  • Add z parameter to image/graphics widgets for more convenient stacking in z-axis
Bugfixes
  • Improve image/graphics layering on z-axis
  • Add missing id and ScreenPage parameter to image widget

Version 2.1.1 (12.11.2024)

Features
  • ---
API changes
  • ---
Bugfixes
  • Fix handling of HOST UART pull-ups causing increase of power consumption when WIFI module is set to sleep mode

Version 2.1.0 (24.06.2024)

Features
  • Add image widget. Upload possible via CmdBuilder
  • Add possibility to overlay graphics and image widgets by other widgets
  • Add new parameters to SYS command: DisableRepliesViaUart, DisableRepliesViaVcp and DisableCommMirror
  • Improve WIFI module autoinitialization
API changes
  • Actions that are not valid commands (generic text) are sent to master without automatic CRLF termination - append '\r\n' to action if needed from now on
Bugfixes
  • Reduced sleep->active transition duration
  • Fix touch panel intialization causing problems in one case
  • Fix value parsing when parseMask has multiple '%' characters
  • Improved RTC calendar access that may caused incorrect readings

Version 2.0.2 (5.12.2023)

Features
  • ---
API changes
  • ---
Bugfixes
  • Fix of RTC synchronization taking too long in some cases
  • Add compability layer for new WIFI module
  • WIFI sleep time can be configured by assigning value to sleep parameter

Version 2.0.1 (1.11.2023)

Features
  • ---
API changes
  • ---
Bugfixes
  • Fix bug when GUI widget is replaced causing visual artefacts when its screen page is re-rendered
  • Fix unhandled defaultVoutState configuration
  • Fix date parsing
  • Improved RTC calendar access that may caused incorrect readings

Version 2.0.0 (5.10.2023)

Features
  • Add WIFI module support with related commands
  • Add remote control capability over WIFI
  • Add MODBUS RTU support with related commands
  • Add ActionOnParse command that will extract message section and perform configurable action with this section
  • Add posibility to use interface UART pins as HOST UART with UseAlternateHostUart parameter (as HOST UART may be occupied with WIFI module)
  • Command filling is now also possible for multi-action buttons (those invoking list for user to select action)
  • Add command echoing to master when command was executed internally (via widget, timer etc...) - can be disabled by DisableInternalCommandEchoing parameter
API changes
  • Quotes that are not the beginning or the end of command parameter body must be escaped by '\' from now
Bugfixes
  • Various bugfixes (LogWin, screen manager, memory management, HMI widget removal, parsing, PWM...)

Version 1.3.0 (06.04.2023)

Features
  • Button, checkbox and form widgets can have multi-line labels from now (by using '\n' characters)
  • Add LineSpacing parameter to all widgets having multi-line capability
  • Add ParseMask to slider widget (another synchronization feature)
  • Add ERR-CMD-PARAM_STRING_TOO_LONG error
  • Increased maximum length of text parameters (button, text and form widgets)
  • Add Wait system command
  • Add ContinueOnActionError system parameter
API changes
  • Slider TrackColor parameter renamed to OutlineColor
  • Removed multiline parameter from text widget (it is multiline always when '\n' characters are present)
  • (Add new parameters - see Features)
Bugfixes
  • Bugfixes related to parsing both commands and strings via parse-mask
  • Fix expression-based ReadFormat evaluation (interfaces)
  • Fix multi-action button rendering

Version 1.2.1 (27.02.2023)

Bugfixes
  • Fix invalid HOST UART and interface UART baud-rate reconfiguration
  • Print only validly received words from UART interface when receive timeout has expired before all requested words were received
  • Allow special character transmission when transmitting in ASCII mode via UART interface TX or TXRX operations

Version 1.2.0 (16.02.2023)

Features
  • Add command request ID marking feature (for request-reply pairing)
  • Add expression based ReadForm for interfaces with labels to ease parsing
  • Add longer time-bases for plots and improve time-base value display format (ms/s/m)
  • Add float parsing with adjustable precision via usage of %f or %.nF mark in ParseMask parameter
  • Add possibility to change form value via command (it was possible only via parsing)
API changes
  • Multi-action (multi-text) button list of actions and texts are now separated by '|' instead of '/'
  • Interfaces "ReadFormat" must be enclosed in quotation marks
  • "Initialized" parameter changed to "Init"
  • Modified UART interface TXRX operation (differs from SPI TXRX) - see manual
Bugfixes
  • Fix error reporting to prevent overflows
  • Fix multi-action button text rendering to prevent sreen overflow for too large texts
  • Prevent displaying outdated form values when layout was loaded
  • Recover slider position to initial value when layout was loaded
  • Fix float rendering

Version 1.1.1 (05.01.2023)

Bugfixes
  • Fix command parsing when LF is used as command termination method

Version 1.1.0 (18.11.2022)

Features
  • Add I2C address scan feature (whole 7-bit address range)
  • Add possibility to intialize intefaces via single alias command (e.g. SPI i=1) - GPIOs will be reconfigured implicitly this way
  • Add automatic dimension calculation for forms, buttons and checkboxes when dimensions (width/height) were not specified explicitly (it is calculated depending on text length, font, design etc...)
  • Add periodic overcurrent check for VOUT domain with automatic VOUT disabling and error reporting
  • Add smoother LCD backlight activation
Bugfixes
  • Prevent form to parse its own display command string
  • Fix incorrect form rendering for specific form types
  • Fix SPI read data printout for not-so typical word lengths
  • Fix UART transmission in specific parity and word length combinations
  • Fix USB TX FIFO overwritting
  • Landscape orientation fixes

Version 1.0.1 (9.9.2022)

Bugfixes
  • Fix of USB transmission buffer handling causing occasional TX data corruption
  • Improvement of ADC auto-calibration routine to get more consistent conversions when ADC offset drift is near to the middle of two calibration factors

Version 1.0.0 (29.8.2022)

Features
  • Add offset parameter for DAC pattern generator
  • Add square waveform to DAC pattern generator
  • ParseReplies system parameter renamed to ParseRepliesDisable and is 0 by default(replies are parsed)
  • Add multi-action (i.e user selectable action) possibility to button widget with multi-label possibility. See manual.
  • Add 10b addressing feature to I2C interface
  • Add different bit order (LSb first) feature to SPI interface
  • Adjusted DAC interface API
  • Do not execute next command when previous has failed (e.g. button actions separated by '+')
  • Do not change checkbox state when its action on tick or untick has failed.
Bugfixes
  • Add missing CRLF to several replies
  • Fix replies compositing in few cases to be parseable by forms
  • Fix screen artifacts issue when object removal (e.g. clearScreenPage) was not finished and new objects are beign inserted
  • Fix STOPLOG and CLEARLOG commands
  • Fix ADC and GPIO interface parameter re-init
  • Fix ADC locking-up when continuous conversion is interrupted by one-shot

Version 0.91 (16.7.2022)

Features
  • Add text widget line decoration feature (underline, line, overline)
  • Add text parameter to checkbox widget for labeling purposes with different positioning possibilities
  • Add checkbox background color and checkbox width parameters to be able to get more modern-looking checkbox design (see manual)
  • Add %_ mark for keypad filling feature. It will be filled by a previously filled mark. This allows a user to set multiple parameters to the same value (e.g. to fill some value via keypad and automatically edit slider widget at the same time so it will be readjusted to the same value when it is also used as input method for the same value).
  • Allow a checkbox to redefine its state (e.g. there can be a group of checkboxes with one checkbox that is untickable by itself (aka "default" value checkbox))
Bugfixes
  • PWM bugfixes and improvements
  • Text widget bugfixes and improvements

Version 0.90 (23.6.2022)

Initial version