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History of Klipper releases. Please see installation for information on installing Klipper.

Klipper 0.12.0

Available on 20231110. Major changes in this release:

  • Support for COPY and MIRROR modes on IDEX printers.
  • Several micro-controller improvements:
    • Support for new ar100 and hc32f460 architectures.
    • Support for stm32f7, stm32g0b0, stm32g07x, stm32g4, stm32h723, n32g45x, samc21, and samd21j18 chip variants.
    • Improved DFU and Katapult reboot handling.
    • Improved performance on USB to CANbus bridge mode.
    • Improved performance on "linux mcu".
    • New support for software based i2c.
  • New hardware support for tmc2240 stepper motor drivers, lis2dw12 accelerometers, and aht10 temperature sensors.
  • New axis_twist_compensation and temperature_combined modules added.
  • New support for gcode arcs in XY, XZ, and YZ planes.
  • Several bug fixes and code cleanups.

Klipper 0.11.0

Available on 20221128. Major changes in this release:

  • Trinamic stepper motor driver "step on both edges" optimization.
  • Support for Python3. The Klipper host code will run with either Python2 or Python3.
  • Enhanced CAN bus support. Support for CAN bus on rp2040, stm32g0, stm32h7, same51, and same54 chips. Support for "USB to CAN bus bridge" mode.
  • Support for CanBoot bootloader.
  • Support for mpu9250 and mpu6050 accelerometers.
  • Improved error handling for max31856, max31855, max31865, and max6675 temperature sensors.
  • It is now possible to configure LEDs to update during long running G-Code commands using LED "template" support.
  • Several micro-controller improvements. New support for stm32h743, stm32h750, stm32l412, stm32g0b1, same70, same51, and same54 chips. Support for i2c reads on atsamd and stm32f0. Hardware pwm support on stm32. Linux mcu signal based event dispatch. New rp2040 support for "make flash", i2c, and rp2040-e5 USB errata.
  • New modules added: angle, dac084S085, exclude_object, led, mpu9250, pca9632, smart_effector, z_thermal_adjust. New deltesian kinematics added. New dump_mcu tool added.
  • Several bug fixes and code cleanups.

Klipper 0.10.0

Available on 20210929. Major changes in this release:

  • Support for "Multi-MCU Homing". It is now possible for a stepper motor and its endstop to be wired to separate micro-controllers. This simplifies wiring of Z probes on "toolhead boards".
  • Klipper now has a Community Discord Server and a Community Discourse Server.
  • The Klipper website now uses the "mkdocs" infrastructure. There is also a Klipper Translations project.
  • Automated support for flashing firmware via sdcard on many boards.
  • New kinematic support for "Hybrid CoreXY" and "Hybrid CoreXZ" printers.
  • Klipper now uses rotation_distance to configure stepper motor travel distances.
  • The main Klipper host code can now directly communicate with micro-controllers using CAN bus.
  • New "motion analysis" system. Klipper's internal motion updates and sensor results can be tracked and logged for analysis.
  • Trinamic stepper motor drivers are now continuously monitored for error conditions.
  • Support for the rp2040 micro-controller (Raspberry Pi Pico boards).
  • The "make menuconfig" system now utilizes kconfiglib.
  • Many additional modules added: ds18b20, duplicate_pin_override, filament_motion_sensor, palette2, motion_report, pca9533, pulse_counter, save_variables, sdcard_loop, temperature_host, temperature_mcu
  • Several bug fixes and code cleanups.

Klipper 0.9.0

Available on 20201020. Major changes in this release:

  • Support for "Input Shaping" - a mechanism to counteract printer resonance. It can reduce or eliminate "ringing" in prints.
  • New "Smooth Pressure Advance" system. This implements "Pressure Advance" without introducing instantaneous velocity changes. It is also now possible to tune pressure advance using a "Tuning Tower" method.
  • New "webhooks" API server. This provides a programmable JSON interface to Klipper.
  • The LCD display and menu are now configurable using the Jinja2 template language.
  • The TMC2208 stepper motor drivers can now be used in "standalone" mode with Klipper.
  • Improved BL-Touch v3 support.
  • Improved USB identification. Klipper now has its own USB identification code and micro-controllers can now report their unique serial numbers during USB identification.
  • New kinematic support for "Rotary Delta" and "CoreXZ" printers.
  • Micro-controller improvements: support for stm32f070, support for stm32f207, support for GPIO pins on "Linux MCU", stm32 "HID bootloader" support, Chitu bootloader support, MKS Robin bootloader support.
  • Improved handling of Python "garbage collection" events.
  • Many additional modules added: adc_scaled, adxl345, bme280, display_status, extruder_stepper, fan_generic, hall_filament_width_sensor, htu21d, homing_heaters, input_shaper, lm75, print_stats, resonance_tester, shaper_calibrate, query_adc, graph_accelerometer, graph_extruder, graph_motion, graph_shaper, graph_temp_sensor, whconsole
  • Several bug fixes and code cleanups.

Klipper 0.9.1

Available on 20201028. Release containing only bug fixes.

Klipper 0.8.0

Available on 20191021. Major changes in this release:

  • New G-Code command template support. G-Code in the config file is now evaluated with the Jinja2 template language.
  • Improvements to Trinamic stepper drivers:
    • New support for TMC2209 and TMC5160 drivers.
    • Improved DUMP_TMC, SET_TMC_CURRENT, and INIT_TMC G-Code commands.
    • Improved support for TMC UART handling with an analog mux.
  • Improved homing, probing, and bed leveling support:
    • New manual_probe, bed_screws, screws_tilt_adjust, skew_correction, safe_z_home modules added.
    • Enhanced multi-sample probing with median, average, and retry logic.
    • Improved documentation for BL-Touch, probe calibration, endstop calibration, delta calibration, sensorless homing, and endstop phase calibration.
    • Improved homing support on a large Z axis.
  • Many Klipper micro-controller improvements:
    • Klipper ported to: SAM3X8C, SAM4S8C, SAMD51, STM32F042, STM32F4
    • New USB CDC driver implementations on SAM3X, SAM4, STM32F4.
    • Enhanced support for flashing Klipper over USB.
    • Software SPI support.
    • Greatly improved temperature filtering on the LPC176x.
    • Early output pin settings can be configured in the micro-controller.
  • New website with the Klipper documentation:
    • Klipper now has a logo.
  • Experimental support for polar and "cable winch" kinematics.
  • The config file can now include other config files.
  • Many additional modules added: board_pins, controller_fan, delayed_gcode, dotstar, filament_switch_sensor, firmware_retraction, gcode_arcs, gcode_button, heater_generic, manual_stepper, mcp4018, mcp4728, neopixel, pause_resume, respond, temperature_sensor tsl1401cl_filament_width_sensor, tuning_tower
  • Several bug fixes and code cleanups.

Klipper 0.7.0

Available on 20181220. Major changes in this release:

  • Klipper now supports "mesh" bed leveling
  • New support for "enhanced" delta calibration (calibrates print x/y dimensions on delta printers)
  • Support for run-time configuration of Trinamic stepper motor drivers (tmc2130, tmc2208, tmc2660)
  • Improved temperature sensor support: MAX6675, MAX31855, MAX31856, MAX31865, custom thermistors, common pt100 style sensors
  • Several new modules: temperature_fan, sx1509, force_move, mcp4451, z_tilt, quad_gantry_level, endstop_phase, bltouch
  • Expanded LCD display support:
    • Support for run-time menus
    • New display icons
    • Support for "uc1701" and "ssd1306" displays
  • Additional micro-controller support:
    • Klipper ported to: LPC176x (Smoothieboards), SAM4E8E (Duet2), SAMD21 (Arduino Zero), STM32F103 ("Blue pill" devices), atmega32u4
    • New Generic USB CDC driver implemented on AVR, LPC176x, SAMD21, and STM32F103
    • Performance improvements on ARM processors
  • The kinematics code was rewritten to use an "iterative solver"
  • New automatic test cases for the Klipper host software
  • Many new example config files for common off-the-shelf printers
  • Documentation updates for bootloaders, benchmarking, micro-controller porting, config checks, pin mapping, slicer settings, packaging, and more
  • Several bug fixes and code cleanups

Klipper 0.6.0

Available on 20180331. Major changes in this release:

  • Enhanced heater and thermistor hardware failure checks
  • Support for Z probes
  • Initial support for automatic parameter calibration on deltas (via a new delta_calibrate command)
  • Initial support for bed tilt compensation (via bed_tilt_calibrate command)
  • Initial support for "safe homing" and homing overrides
  • Initial support for displaying status on RepRapDiscount style 2004 and 12864 displays
  • New multi-extruder improvements:
    • Support for shared heaters
    • Initial support for dual carriages
  • Support for configuring multiple steppers per axis (eg, dual Z)
  • Support for custom digital and pwm output pins (with a new SET_PIN command)
  • Initial support for a "virtual sdcard" that allows printing directly from Klipper (helps on machines too slow to run OctoPrint well)
  • Support for setting different arm lengths on each tower of a delta
  • Support for G-Code M220/M221 commands (speed factor override / extrude factor override)
  • Several documentation updates:
    • Many new example config files for common off-the-shelf printers
    • New multiple MCU config example
    • New bltouch sensor config example
    • New FAQ, config check, and G-Code documents
  • Initial support for continuous integration testing on all github commits
  • Several bug fixes and code cleanups

Klipper 0.5.0

Available on 20171025. Major changes in this release:

  • Support for printers with multiple extruders.
  • Initial support for running on the Beaglebone PRU. Initial support for the Replicape board.
  • Initial support for running the micro-controller code in a real-time Linux process.
  • Support for multiple micro-controllers. (For example, one could control an extruder with one micro-controller and the rest of the printer with another.) Software clock synchronization is implemented to coordinate actions between micro-controllers.
  • Stepper performance improvements (20Mhz AVRs up to 189K steps per second).
  • Support for controlling servos and support for defining nozzle cooling fans.
  • Several bug fixes and code cleanups

Klipper 0.4.0

Available on 20170503. Major changes in this release:

  • Improved installation on Raspberry Pi machines. Most of the install is now scripted.
  • Support for corexy kinematics
  • Documentation updates: New Kinematics document, new Pressure Advance tuning guide, new example config files, and more
  • Stepper performance improvements (20Mhz AVRs over 175K steps per second, Arduino Due over 460K)
  • Support for automatic micro-controller resets. Support for resets via toggling USB power on Raspberry Pi.
  • The pressure advance algorithm now works with look-ahead to reduce pressure changes during cornering.
  • Support for limiting the top speed of short zigzag moves
  • Support for AD595 sensors
  • Several bug fixes and code cleanups

Klipper 0.3.0

Available on 20161223. Major changes in this release:

  • Improved documentation
  • Support for robots with delta kinematics
  • Support for Arduino Due micro-controller (ARM cortex-M3)
  • Support for USB based AVR micro-controllers
  • Support for "pressure advance" algorithm - it reduces ooze during prints.
  • New "stepper phased based endstop" feature - enables higher precision on endstop homing.
  • Support for "extended g-code" commands such as "help", "restart", and "status".
  • Support for reloading the Klipper config and restarting the host software by issuing a "restart" command from the terminal.
  • Stepper performance improvements (20Mhz AVRs up to 158K steps per second).
  • Improved error reporting. Most errors now shown via the terminal along with help on how to resolve.
  • Several bug fixes and code cleanups

Klipper 0.2.0

Initial release of Klipper. Available on 20160525. Major features available in the initial release include:

  • Basic support for cartesian printers (steppers, extruder, heated bed, cooling fan).
  • Support for common g-code commands. Support for interfacing with OctoPrint.
  • Acceleration and lookahead handling
  • Support for AVR micro-controllers via standard serial ports
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