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Marlin 2.1.2.2 is a maintenance release with several patches to improve existing features, with minor adjustments to configuration.

New Features

• ✨ Add Thermistor 14 (used for the Ender-5 S1).

Issues Fixed

• 🐛 Fix I/J/K chopper timing (#26736)
• 🚸 Fix repeating "Power Off" message (#26755)
• 🐛 Fix G38 probe target probe checking.
• 🚸 Raise top temperature to 320°C for Thermistor 1.
• 🐛 Fix leveling XY move feedrate on ExtUI displays.
• 🐛 Fix quick homing for UVW with SENSORLESS_HOMING.
• 🔧 Improved support for machines without X, Y, Z, E axes.
• 🚸 Remove extra G76 probe raise.
• 🔧 Allow per-axis baud rate for TMC stepper drivers.
• 🐛 Fix fan software PWM init.
• 🐛 Fix inverted fan state.
• 🐛 Fix init for inverted heater states.
• 🐛 Fix build error with Thermistor 68.
• 🐛 Fix support for more than 4 servos.
• 🐛 Ensure serial flush after M303.
• 🐛 Fix M125 wait for user with some displays.

LCD / Controller / UI

• 🚸 Fix Filament Change item position with/without encoder.
• 🚸 Update FTDI Eve Touch UI (Lulzbot / Cocoa Press).
• 🍱 Update DWIN icon graphic files.
• 🚸 Use the term "Tramming" instead of "Level Corners."
• 🌐 Update Romanian font data.
• 🌐 Allow menu strings to contain '='.

Build / Install

• 🔨 Improve PlatformIO INI feature filters.
• 🔨 Apply specific version / commit ID to libraries.

Boards / Pins

• 🔧 Rename BOARD_BTT_MANTA_M4P_V1_0 to BOARD_BTT_MANTA_M4P_V2_1.
• 🎨 Replace LCD_PINS_ENABLE with LCD_PINS_EN.
• 🎨 Replace FAN_PIN with FAN0_PIN.
• 🎨 Replace SDIO_SUPPORT with ONBOARD_SDIO.
• 🔥 Remove unpublished board VAkE 403D.

Configuration Changes

• 📝 Update links to products, documentation.
• 🔧 Move configuration change alerts to inc/Changes.h.
• 🔧 Replace DISABLE_[AXIS] true/false with simple switches DISABLE_[AXIS].
• 🔧 Replace TFT_SHARED_SPI with TFT_SHARED_IO.
• 🔧 Remove X2_HOME_DIR (always assume +1).
• 🔧 Remove EXPERIMENTAL_SCURVE (not needed).
• 🔧 Replace TMC_SW_MOSI/MISO/SCK with TMC_SPI_MOSI/MISO/SCK.
• 🔧 Replace BTT_MINI_12864_V1 with BTT_MINI_12864.
• 🔧 Replace FOLDER_SORTING with SDSORT_FOLDERS.
• 🔧 Replace DISABLE_INACTIVE_EXTRUDER with DISABLE_OTHER_EXTRUDERS.
• 🔧 Replace DEFAULT_STEPPER_DEACTIVE_TIME with DEFAULT_STEPPER_TIMEOUT_SEC.
• 🔧 Replace DISABLE_INACTIVE_[AXIS] true/false with simple switches DISABLE_IDLE_[AXIS].

General Cleanup

• 🎨 Clean up file headings, whitespace, code formatting, comments.

For Developers

• 🧑‍💻 Globally replace EITHER/BOTH with ANY/ALL
• 🧑‍💻 Globally replace LOOP* macros with for loops.
• 🧑‍💻 Globally replace SDSUPPORT with conditional HAS_MEDIA.
• 🧑‍💻 Replace ADC_VREF with ADC_VREF_MV for easier validation.
• 🧑‍💻 Replace AS_CHAR() with C() for serial echo.

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6

• 🔨 Update for compatibility with PlatformIO 6