> For the complete documentation index, see [llms.txt](https://guide.cronuszen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.cronuszen.com/changelogs/changelog-26.md). # Changelog (26) {% hint style="info" %} Newest first. For earlier releases, see Changelog [2025](/changelogs/changelog-26/changelog-25.md), [2024](/changelogs/changelog-26/changelog-24.md), [2023](/changelogs/changelog-26/changelog-23.md) and [2022](/changelogs/changelog-26/changelog-22.md). {% endhint %} #### :microchip: Cronus Zen™ firmware
v2.3.2 — August 18, 2026 **Added** * Trigonometry math functions: `sin`, `cos`, `tan`, `asin`, `acos`, and `atan2` * Support for the unified Zen Link™ v1/v2 firmware **Fixed** * Clearing Bluetooth® did not fully clear or unpair a connected device * DualShock®4 and DualSense™ light bar and rumble behaviour is now consistent between USB and Bluetooth® * General bug fixes and improvements
v2.3.1 — July 9, 2026 **Fixed** * Slot 8 readback issue
v2.3.0 — July 2, 2026 **Added** * GameSir G7 Pro controller support * BVARS, giving each slot **1024 extra 16-bit persistent values** for scripts * High-resolution Mouse Ballistics Curve **Improved** * Audio handling * Elite Series 2 controller detection * General optimizations and minor bug fixes
*** #### :link: Zen Link™
v2.1.4 — August 20, 2026 **Added** * A quick tap of the config button cycles the LED brightness: **dim → four steps → max → off → dim**. Dim is the default — see Brightness * Holding the config button for more than five seconds enters BLE mode for changing the Wi-Fi settings. If the phone app is already running, restart it so it can detect the Zen Link™ * BLE mode can be left at any time by tapping the config button again. Nothing is changed unless new Wi-Fi settings are submitted **Changed** * The idle state is now a dim white LED, replacing the previous two white blinks
v2.1.3 — August 18, 2026 **Changed** * Unified firmware for Zen Link™ v1 and v2 **Improved** * LED status signals — see Status Light * General stability
*** #### :code: Zen Studio Live
v1.0.8 — August 22, 2026 **Added** * Upload is blocked when the active script is blank or compiles to nothing, and the reason is named on the button and in the dialog * Open device confirmations — erase memory, clear Bluetooth®, factory reset, restart — close themselves when the Cronus Zen™ disconnects * `GPC3020` warning for `:` used as a statement terminator * `GPC5143` error when combo state slots exceed the available capacity * `GPC6038` warning for an empty combo **Fixed** * Undo in the OLED editor no longer leaves the selection pointing at an object that is gone * OLED image import and nudge refuse an unresolved selection instead of quietly editing the Background layer * Reads from the Cronus Zen™ retry on a transient integrity fault instead of failing outright * A connection that fails partway through startup no longer leaves the app showing a ready device * Folding of division, modulo, shift and clamp matches how the Cronus Zen™ evaluates them at runtime * Float literals round the way Zen Studio rounds them * The optimizer no longer drops side effects from the initializer of a removed `for` loop * Combo steps stay correct after the optimizer rewrites a combo body * Long flat operator chains count toward the expression nesting limit instead of slipping past it * `sizeof()` array sizes resolve correctly, and an unusable array size is reported once instead of twice * Device read timeouts no longer drift * Formatting a script is now stable — running it again on formatted code leaves it unchanged **Improved** * Programming waits for the Cronus Zen™ to report erase completion before the first write * Disconnects are detected right away and carry a reason, so nothing is sent to a device that is already gone * General diagnostics, error handling, stability, and reliability
v1.0.7 — August 18, 2026 **Added** * QR code objects in the OLED Message Screen editor, re-editable after creation, with error correction and size options and a warning when a code will not fit the screen * Position anchor grid to snap any OLED object to one of nine spots on the canvas * Open tabs now talk to each other: when another tab is holding the Cronus Zen™, the in-use indicator can alert that tab with a title flash, a toast and an optional browser notification * Device Settings entry in the Device Management sidebar menu * Single-tab device lock setting for advanced users * Publish date shown on script cards in the Script Library * Combined GamePack sort choices in the slot list * Right-click a Device Monitor cell to copy its raw value * Automatic retry when slot programming is interrupted mid-write, with a cancellable wait * Zen Link™ status indicator in the status bar, with a popover showing the link's state, its own firmware version and serial, and a refresh button * Version history for Script Library scripts: **Details** and **History** tabs, switching to any earlier release, and a banner with **Go to latest** when viewing an older one * Stack budget meter in the Output panel, showing how much of the Cronus Zen™'s stack a script's variables and runtime cost use * Evaluate an expression or convert a number's radix straight from the editor's right-click menu * Editor settings to turn quick suggestions and parameter hints off * Live "too narrow" warning when the picture-in-picture Device Monitor is sized below what it can render * Trigonometry built-ins on the Zen32: `sin`, `cos`, `tan`, `asin`, `acos`, and `atan2` — they take and return degrees, with values scaled by 10000 **Fixed** * GamePack options with more than one choice are now treated as multiple choice * Script Library upload rejects blank content instead of failing later * Attached Devices popover opened on the wrong surface in some places * Editor Settings dialog now keeps full height * SPVAR editor button labels and wording * Nintendo Switch® was not always detected as the connected console * MAX Combo defaulted its controller to PS3® instead of PS5® * **Push** and **Pull** labels in the editor's git bar were unreadable * Very large scripts could break the editor instead of loading with reduced features * Scripts saved as UTF-16 are now opened and decoded correctly, and files that are not source are rejected on every open path * **Restore File Access** kept asking after being declined * Merge conflicts are entered reliably, and conflict markers glued to code are put back on their own lines * A stalled git remote request now fails visibly instead of hanging * `set_ps4_lbar` took its colour parameters in the wrong order * `wait()` in an expression now reports an error instead of crashing the compiler * Calls with the wrong number of arguments to a built-in are reported instead of silently dropped * Variable slot usage reported the number of declarations instead of the slots actually used * **Go to definition** and **Rename** now anchor on the declaration's name * Formatter output stays plain ASCII and no longer leaves minified scripts on one line **Changed** * Closing or reloading the page is now blocked while programming or updating the device * The **Update Available** banner can no longer be dismissed, and update notices are much harder to miss **Improved** * Attached Devices popover reworked into a tree grid that shows how devices are connected * Editor dialogs now use Zen Studio Live's own window chrome, grow to fit their content, and wrap long text * Slots are verified against the Cronus Zen™ after programming, and slot backups check the size read back against the slot's own metadata * Connecting now gives up cleanly instead of hanging when the Cronus Zen™ stops responding * Clearing Bluetooth® no longer asks you to type a confirmation, and the remaining confirmations are quicker to get through * Device Monitor opens at the width needed for the PS5® adaptive trigger columns * Output panel filter badges now match what is actually filtered * Data section summary counts strings, images, and adaptive trigger tables as items * GamePack sort labels reworded to plain language * General diagnostics, error handling, stability, and reliability **Removed** * Legacy `PVAR_1` to `PVAR_16` from the Zen and Zen32 built-ins
v1.0.6 — July 17, 2026 **Added** * Ternary conditional operator (`condition ? a : b`) in scripts * GPC2117 error for a ternary missing its `:` * GPC4032 error when a ternary is used as a standalone statement * **Fix** and **Fix All** buttons in the compiler output panel apply available quick fixes directly * Hovering an enum member or define now shows its resolved value **Fixed** * Saved M\&K profiles now store and restore ballistic curves correctly * Device Settings no longer shifts layout while values load from the Cronus Zen™ * Restarting the Cronus Zen™ no longer loses settings applied just before the restart * Incorrect parameter-limit errors on some built-in functions * Fallthrough warning no longer appears on empty switch cases * Find References and symbol highlighting now respect scope and symbol type * Stray text cursor no longer appears over icons and read-only text **Improved** * Firmware update wizard retries a failed update automatically, with the option to cancel while it waits to retry * Device settings changes apply without restarting the Cronus Zen™ * Cronus Zen™ commands now retry automatically on recoverable communication errors * Sending a Library script directly to a slot no longer leaves its tab behind after a reload (editing the script keeps it) * Device Management moved into the sidebar Tools group * General diagnostics, error handling, stability, and reliability
v1.0.5 — July 12, 2026 **Added** * Every successful compile now shows slot, stack, and bytecode usage against your Cronus Zen™'s maximum limits * Lightbulb fixes are now driven by the real parser, allowing edits to land precisely without overlaps or duplicate suggestions * New fixes cover unused declarations, switch fallthrough, assignments inside conditions, unconsumed return values, and single or multi-variable `for` declarations * Hover, rename, references, cursor targeting, quickfixes, and the Problems panel now align correctly in scripts containing accents, symbols, or other non-ASCII text * The bug report dialog can now capture detailed Cronus Zen™ traffic for the current session **Fixed** * Momentary device-state races no longer cause false "connection lost" disconnects * The Build button can no longer remain stuck after a failed compile * Tab menus now target the correct tab, Git files restore using the correct language, close buttons remain visible, and dialogs correctly handle Escape and Enter * Keyboard shortcuts no longer trigger while typing outside the editor * Invalid switch-case values no longer disrupt the remaining case labels * Multiline strings no longer shift diagnostic line numbers * Outline and analytics panels clear correctly when switching to an empty tab * Long usernames no longer break profile layouts on the Library page **Improved** * Script flashing and device reads are now much more reliable when the Cronus Zen™ streams live data during an operation, preventing silent timeouts and corrupted reads * Ctrl + S now detects files changed outside the editor and handles them safely * Unsaved work is preserved when moving tabs between editor panes * Workspace saving now recovers gracefully when browser storage fails and flushes when switching away from the tab * Changes to the auto-save setting now apply immediately without requiring a reload * Messages for `REMAP_NULL`, switch-case traps, memory limits, and other diagnostics are now clearer and more actionable * Failed compiles now show an accurate summary that resets correctly before the next build * When a new update becomes available, Zen Studio Live now prompts you to reload instead of failing on stale application files * Broad reliability improvements across diagnostics, error handling, saving, tabs, and Cronus Zen™ communication
v1.0.4 — July 9, 2026 **Fixed** * Firmware updater getting stuck after downloading the firmware
v1.0.3 — July 9, 2026 **Added** * GPC3012–GPC3017: const-array narrowing warnings * New warnings for zero-folding division/modulo and "glued" negative numbers such as `x -1` * Restart your Zen directly from the app. Zen Studio Live also restarts the device automatically after writing output, PS4®, or Remote Play settings * Capture bindings by pressing a key, mouse button, or controller button on your connected device * Name mapped buttons inline. Labels save with your profile and `.zmk` exports * Exclude specific devices from capture, with quick-add options from the device tiles * Save, export, download, and profile actions now show confirmation toasts * Top Scripts on the Home page are now votable, with confirmation before each vote is submitted **Fixed** * Duplicate tabs, cancelled-save tab closing, clipped hover tooltips and suggestions in split view, and a startup crash caused by duplicated tabs * Compile results now stay with the tab that compiled them, and stale compiles can no longer overwrite another tab's results * Diagnostic positions are now correct in scripts containing non-ASCII characters, including accents and emoji * The upload dialog now shows the correct active file name * Incorrect slot names in empty-readback errors, Flash All confirmation with no pending changes, and header wrapping * Live BALC dots, button-label length caps, device-tile layout issues, and label caption clipping * The PS5® ADT column font size now matches the rest of the monitor * The downvote tally is now hidden while vote buttons remain available * A Script Library upload issue that could occur in Brave * Failed `addr()` and 2D const-array lookups now report diagnostics instead of returning wrong values * `sizeof(image)` now returns the element size, `1` **Improved** * 2D const-array index, address bounds, and single-bracket access are now validated * Data-section address arguments are now checked against section size * Built-in argument limits now error instead of slipping through * Stray `;` expressions now error with **Expected expression** instead of compiling as `0` * Zero-size array aliasing now warns with GPC6031; zero-size arrays without an alias target now error * Deeply nested scripts are now caught instead of silently overflowing * On 16-bit devices, constant math now truncates correctly to match device behavior * Uppercase `0X` hexadecimal notation is now accepted * Flashing and firmware update communication has been reworked to reduce write failures and stalls * Program is now always available when a connected, supported device is ready * Free-draw strokes are faster and no longer drop pixels during quick movements * The server status indicator now reflects real request outcomes, reducing false offline or online states * Startup behavior and library loading
v1.0.2 — July 4, 2026 **Added** * Work with two side-by-side editor panes for easier comparison, editing, and script navigation * Move tabs freely between editor panes, or use the drag-to-dock overlay to split or move a tab * Tab context menus and editor strip buttons now include split options * Dropping a file that is already open in the other pane now jumps to that tab instead of opening a duplicate * Pane layout and split ratio now persist across reloads * If the built-in firmware updater gives you trouble, a clearly labeled link now takes you to the official online updater after handing your Zen over cleanly * The connected-device area now shows when newer firmware is available, plus a once-per-session heads-up * Your M\&K profile and ballistic curves now survive device disconnects. Unsaved changes now trigger a **Save** / **Discard** prompt * If your Zen is already being used by another tab or app, Zen Studio Live now shows a clear **in use elsewhere** state **Fixed** * Constants now resolve correctly inside `data()` section values * Const-array usage is no longer incorrectly reported as unused * `addr()` on jagged const arrays now resolves element addresses correctly * Hex escapes from `\x80` to `\xFF` now emit as single bytes * Enum members and variables now use the correct symbol icons **Improved** * General editor stability * Workspace-restore reliability * Cursor detection inside comments and strings is now more accurate * The updater now handles busy devices, device handoff, disconnects during update, and **Try Again** recovery more reliably * The success screen now shows the installed version, outdated firmware states show the available update, and rejected updates show the correct reconnect fix * GitHub sign-in now completes inside its popup instead of reloading the whole app * Flashing a new script to a slot no longer inherits leftover values from the previous script * Broad reliability and error-handling improvements across device connections, the Script and GamePack Library, and uploads **Removed** * `get_mk` and `set_mk` are no longer supported
v1.0.0 — July 2, 2026 **Added** * Truly cross-platform: works anywhere a Chromium-based browser runs, including Windows®, macOS®, Linux®, and ChromeOS™ * Full Zen device support in the browser: connect your Zen directly from the page, program slots, use live Device Monitor, configure GamePacks, adjust M\&K settings, run guided firmware updates, and reconnect automatically * Fast, modern editor: snappy code editing and compiling directly in the browser, with built-in Git version control for your scripts * Built-in OLED Studio: design 128×64 OLED screens with layers, shapes, text from any font, image import with dithering, and one-click GPC export. This is not available in the desktop app
*** #### :box-archive: Zen Studio Legacy
v1.7.0 Build 7 — July 2, 2026 **Added** * Launcher for Zen Studio Live **Improved** * Disables Programmer and M\&K tab for firmware higher than 2.2.14
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