2.1.0

Added

• Allow leading underscore in sketch filenames (#1955)
• Open library examples from Library Manager (#1927)
• Pull and Push icons on editor toolbar when Cloud sketch is open (#1899)
• Use icons to indicate pulled state of Cloud sketches in sketchbook list (#1879)
• Show "[Cloud]" indicator in title of windows with Cloud sketch open (#1878)
• Support pushing local sketches to Arduino Cloud (#1876)

Changed

• Base Boards/Library Manager button text on library installation state (#1607)
• Make Boards/Library Manager uninstall interface easier to find (#19)
• Default Boards/Library Manager version menu selection to latest (#1924)
• Improve performance of Library Manager search (#1949)
• Refocus Serial Monitor after verify/upload (#1979)
• Indicate theme type in Preferences menu (#1994)
• Update Arduino CLI dependency to 0.32.2 (#1996)

Removed

• Don't offer deprecated themes in Preferences dialog (#1283)

Fixed

• Fix Sketchbook view scroll position reverting when selected item scrolled off screen (#1766)
• Fix corruption of multibyte characters in pulled Cloud sketch (#449)
• Fix IDE crash when pushing Cloud sketch (#634)
• Fix incomplete scroll in Serial Monitor after autoscroll enabled (#1736)
• Fix Serial Monitor autoscroll not done for content received when view not in focus (#1724)
• Fix incomplete JSONC support for settings.json (#1945)
• Fix startup fails when arduino.cli.daemon.debug setting enabled (#1942)
• Fix Library Manager version menu change after closure of dependencies installation dialog (#1707)
• Fix Boards/Library Manager entry clipping (#1591)
• Don't offer installation of already installed release in Boards/Library Manager (#781)
• Focus the search field when Boards/Library Manager is opened (#1941)
• Support using debugger with boards platforms installed under non-default data directory location (#1911)
• Fix editor cursor randomly jumping to beginning of line (#437)
• Fix duplicated editor tabs (#1791)
• Focus button in Sketchbook view instead of view container (#1978)
• Show error when monitor process creation fails (#1508)
• Always update themeId settings after theme change (#1988)
• Use appropriate location for manual extension installation folder (#1851)
• Always add #include directive for arduino_secrets.h when pulling Cloud sketches with secrets (#1999)

---

Full Changelog: 2.0.4...2.1.0

2.0.4

Added

• Enable rename and delete of Cloud sketches (#1825)
• Add activity bar icon for Arduino Cloud login (#1877)
• Add support for macOS notarization during local builds (#1916)

Changed

• Show custom board option settings in Tools menu (#343)
• Use a local npm registry for app packaging (#1757)
• Always show File > Sketchbook menu item (#569)
• Always show Tools > Port menu item (#655)
• Use more efficient method to get Arduino CLI version (#1572)
• Remove encoding from status bar (#1393)
• Allow addition of existing code files to sketch (#284)
• Communicate cause of debugger not starting with uncompiled sketch (#808)
• Add leading+trailing line break to "Copy for Forum" content (#1859)
• Improve contrast of cursor color in "Dark (Arduino)" theme (#1251)
• Improve contrast of "Output" view stderr text in "Light (Arduino)" theme (#1087)
• Bump Arduino CLI to 0.31.0 (#1921)
• Use hardwareId for board auto-selection (#1913)
• Update translations (#1763)

Fixed

• Fix File > Preferences disabled if dialog used soon after IDE startup (#1735)
• Prevent opening of multiple "Preferences" dialog instances (#1735)
• Fix support for user-installed theme extensions (#1742)
• Always set "Updatable" filter when Boards Manager/Library Manager opened from update offer dialog (#1740)
• Fix corruption of multi-byte UTF-8 symbols in Serial Monitor (#589)
• Fix Sketch > Upload/Upload Using Programmer menu items remaining disabled after completion of upload (#1722)
• Fix proxy protocol incorrectly shown as "SOCKS" in "Preferences" dialog (#1775)
• Fix support for SOCKS5 proxy protocol (#1769)
• Fix IDE startup hang if sketchbook folder location not accessible (#1764)
• Update affected UI elements after "Sketchbook location" preference change (#796)
• Update affected UI elements after "Add .ZIP Library..." operation (#659)
• Restart language server after change to platform or library (#670)
• Support IDE installation paths that contain # (#1124)
• Pass custom board option settings to language server (#1029)
• Make File > Sketchbook menu reflect sketchbook folder structure (#1185)
• Populate "Board Info" dialog from port data (#1489)
• Use established sort order in Boards Manager and Library Manager listings (#1106)
• Prevent creation of sketches with non-compliant names (#1599)
• Correct handling of primary sketch tab deletion (#649)
• Fix missing toolbar context menu items when editor doesn't have focus (#1847)
• Fix unexpected sketch deletion when location inside sketch folder selected as rename target (#1882)

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @palazzol
• @wh201906

Full Changelog: 2.0.3...2.0.4

2.0.3

Changed

• Switched from arduino.window.zoomLevel to window.zoomLevel preference (#1675)
• Update Cortex-Debug to recent version (#246)

Fixed

• Fix editor widget resolving when creating new tab (#1718)
• Fix keybindings to switch between tabs on MacOs (#1685)
• Other ino files are not reflected in the window title (#1656)
• Debugger does not disconnect after stopping it (#995)
• Scrollbar covers bottom line of Serial Monitor output (#1602)
• Problem leaving "focus" mode (#1550)
• editor.hover.delay setting not used by new windows (#571)
• Window title changes to "index.html" during reload (#999)
• Missing translation in Theia's view-container context menu (#1498)
• Indentation guides are always visible (#1613)
• Rightmost tab is selected by default (#643)
• Selecting "New Remote Sketch" from File menu has no effect if "Remote Sketchbook" widget is not open (#1715)
• Serial Monitor sends spurious data (#375)
• Unable to start debugger when watch expressions are configured (#1582)
• Conditional breakpoint only stops the first time (#268)

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @asereq
• @palazzol

Full Changelog: 2.0.2...2.0.3

2.0.2

Added

• Create remote sketch (#1580)

Fixed

• Spurious IDE update notifications when using snapshot or nightly builds (#1440)
• Autoformat removes new-line before EOF (#1487)
• "Open Recent" menu missing after recent sketch is deleted (#1596)
• Additional sketches can't be opened via file association/command line argument (#1590)
• "Built-in" examples fail to open with Linux AppImage (#1586)
• "Sketchbook" menu missing if sketch name is invalid regex (#1600)
• First time load of project with many files very slow (#1612)

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @kaysievers
• @nmzaheer
• @joshuag1000
• @FrightRisk

Full Changelog: 2.0.1...2.0.2

2.0.1

Added

• Make links to Boards Manager and Library Manager clickable inside the sketch (#1442)
• Message history in Serial Monitor (#1404)
• Create a custom sketch template for new sketches (#1559)
• Add a project contributor guide (#1419)

Changed

• Can send message to the monitor with Enter (#572)
• Show user fields dialog again if upload fails (#1386)
• Update translation files (#1462)
• Put Arduino libs on top of the Library Manager (#1541)
• Changed the daemon output from json to text (#1544)
• Make the "INSTALL" button always visible in Boards Manager and Library Manager (#1568)

Fixed

• Occasional "Unable to watch for file changes in this large workspace" warnings (#39)
• Label of unidentified port missing in "Board Selector" after opening new window (#1383)
• Bring existing Serial Plotter window to foreground when selected from IDE UI (#1346)
• UI unresponsive when sketch has a very long line (#1343)
• Align the primary button in all dialogs in IDE (#1368)
• Serial Monitor autoscroll only makes bottom line partially visible (#972)
• Dialogs UI scalability - Unexpected dialog layouts (#1350)
• Color contrast in the Firmware Updater dialog with the dark theme (#1441)
• Sketchbook folder not created on startup (#1445)
• 3rd party URLs dialog should not wrap text (#1470)
• Keyboard bindings do not work properly after change to different keyboard layouts (#989)
• Add missing translations (#1431)
• Spurious IDE update notifications when using snapshot or nightly builds (#1440)
• "Check for Arduino IDE Updates" operation fails when automatic update checks are disabled (#1437)
• Avoid intellisense widgets being covered by the bottom panel (#1479)
• When opening a dialog, set the focus inside it (#1373)
• Attempt to open deleted sketch from Sketchbook or Examples menus fails silently (#53)
• Serial Plotter requires \r\n line endings (#1360)
• IDE is non-functional if package index can't be loaded (#1084)
• Only package indexes should updated after changing the "Additional Boards Manager URL" preference. (#1156)
• Application allows setting interface scaling interface past limits (#1384)
• Parts of the UI disappear when window is to small (#662 #1515)
• Incorrect spacing of the horizontal rules in the editor hover (#1503)
• Sort Board selection menus like as described in the platform's boards.txt configuration file (#802)
• Intermittent failure to recognize ports (#573)
• The style of the buttons in the library installation dialog break when the labels are too long (#1314)
• Uploading disabled without port selection (#702 #770)
• Opening invalid sketch via file association/command line fails silently (#964)

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @aliphys
• @Chose99
• @dankeboy36
• @Edivad99
• @nbourre
• @nmzaheer
• @r3inbowari
• @plampix
• @tigoe

Full Changelog: 2.0.0...2.0.1

2.0.0

The moment you (and us) all have been waiting for has arrived.
Let's all welcome the official, stable release of Arduino IDE 2.0
🎉🎉🎉

This new IDE provides a modern user interface thanks to its responsive interface, as well as a completely overhauled backend supplied by the Arduino CLI.
We hope you'll enjoy it as much as we enjoy bringing it to you.

Yours truly,
Arduino Team

2.0.0-rc9.4

Fixed

• Leading zeros are stripped from Serial Monitor timestamps (#580)
• Fixed compile regression updating arduino-cli to 0.27.1

Full Changelog: 2.0.0-rc9.3...2.0.0-rc9.4

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @nmzaheer

2.0.0-rc9.3

Added

• Update translations (#1397, #1305)
• Filter Library and Boards Manager listings by category, type (#1361, #177)
• Updatable library and boards platform notifications, with "Update All" option (#1361, #1188)
• Communicate to user when upload is impossible due to no board selection (#1353, #845)
• Link compiler errors to editor (#1275, #118, arduino/Arduino#3383)

Changed

• Make error message from compiling without board selected more user friendly (#1353, #62)
• Remove File > Close Editor menu item (#1351, #660)
• Close compilation/upload error notifications on subsequent actions (#1275, #1154)

Fixed

• Ambiguous character check done inappropriately on "Output" panel text (#1375, #1210)
• "Built-in" libraries can have higher priority than platform bundled libraries (#1370, #1055)
• Incomplete Library and Boards Manager listings (#1361, #716)
• Hang during "Downloading index: ..." process (#1358, arduino/arduino-cli#1804, arduino/arduino-cli#1828, #1330)
• Incorrect mouseover graphic for dirty indicator (#1351, #1034, #647)
• Unnecessary save confirmation dialog when closing unmodified temporary sketch (#1351, #1274, #1026)
• Inconsistent save confirmation dialogs on exit (#1351, #1016)
• Save as native file dialog pops when enabling auto-save on a temp sketch (#1351, #994)
• Missing internationalization for UI strings (#1341)
• Missing port labels (#1335, #1331, #567)
• Failure of OTA upload to ESP8266 boards (#1335, #740)
• Network ports not shown in "Board Selector" menu (#1332, #1327)
• Multiple boards/ports shown as selected in "Board Selector" menu (#1328, #928)
• Incorrect port selection after upload to native USB board (#1328, #710, #287)
• Port changes when board is unplugged (#1328, #180)
• No auto-update offer when using a nightly build (#1326, #1318)
• Dialogs UI scalability (#1311, #1309)

Full Changelog: 2.0.0-rc9.2...2.0.0-rc9.3

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @ben-qnimble
• @ckuethe
• @DeeEmm
• @GClairet
• @JAndrassy
• @KurtE
• @Lorandil
• @me-no-dev
• @Micahfriesen
• @mjs513
• @PaulStoffregen
• @pierrotm777
• @probonopd
• @RudraSen2
• @sellensr
• @Silver-Fang
• @sstaub
• @tigoe
• @toogooda

2.0.0-rc9.2

Added

• Live change of theme from Preferences dropdown (#1296 #1048)
• Add Auto Format item under the Edit menu (#1230)

Changed

• Replaced the splash screen with a preload (#1287)

Fixed

• Upload fails when Serial Monitor is open (#1278)
• Starting IDE creates an "undefined" folder in the current directory (#394)
• Auto Format configuration doesn't match classic Arduino IDE (#42)
• IDE does not load until you return to the Arduino IDE screen and click on something (#193)
• Splash Screen Should not be Always on Top (#324)
• Application start-up is paused when the window is minimized (#327)

Full Changelog: 2.0.0-rc9.1...2.0.0-rc9.2

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @InstantMuffin
• @JayPi4c
• @Logicer16
• @tigoe
• @ggl
• @LordRafa
• @Master811129
• @MicSG-dev
• @80avin

2.0.0-rc9.1

Added

• Show progress indicator during verify/upload (#575 #1175)

Changed

• Improve the UX of the Arduino language server (#1255)

Fixed

• Wrong primary button color in info messages (#1227)
• Verbose output preferences are not applied correctly (#374)
• Incorrect theme shown on first start in settings (#1223)
• Settings dialog broken when scaling up the IDE (#1205)
• IDE2 might forget the selected language (#1219)
• Custom themes do not update correctly (#1225 #1257)
• High Contrast theme fixes (#1202)
• The address of the board is off from the board selection dropdown (#998)
• Quicker upload notification (#279)
• New file is opened using a quarter of the screen (#1244)
• SaveAs hangs with empty window (#1191)

Full Changelog: 2.0.0-rc9...2.0.0-rc9.1

Thanks to everyone who's helping us improve the quality of the Arduino IDE:

• @tigoe
• @Wezz19
• @xinkiknix
• @finncat62
• @KurtE