Source code in this repository contains in the platformio.ini multiple build targets that automatically customize firmware configuration based on desired set of features.

Both PlatformIO build target names and resulting binary filenames follows pattern:

• Build targets: <printer version>_<board>_<features (optional, might be missing)>
• Binary filenames for stock board: <printer version>_<board>_<features (optional, might be missing)>-<version>-firmware.hex
• Binary filenames for BTT boards: <printer version>_<board>_<features (optional, might be missing)>-<version>-firmware.bin

Build Variant	Binary Filename	Comments
anycubic_mega_zero	amz	Anycubic Mega Zero V1, 12V power supply
anycubic_mega_zero2	amz2	Anycubic Mega Zero V2, 24V power supply, heated bed
anycubic_mega_se	amse	Anycubic Mega SE (in development), 24V power supply, heated bed

Board	Comments
melzi	original Anycubic board that comes in printer from factory.
btt_mini	BigTreeTech SKR mini MZ 1.0 or SKR mini E3 V2.0, new STM32 Hardware Adaptation Library (HAL).
btt_mini_maple	BigTreeTech SKR mini MZ 1.0 or SKR mini E3 V2.0, builds are using older (pre-2.0.9) STM32F1 HAL.
btt_e3turbo	BigTreeTech SKR E3 Turbo
btt_minie3v3	BigTreeTech SKR mini E3 V3.0

Feature	Description
bed	Heated bed (for MegaZero 1, enabled by default in MegaZero 2 builds)
bl	Automatic leveling sensors: BLTouch. See Leveling Sensors wiki page
bfpt	Automatic leveling sensors: BFPTouch (DIY). See Leveling Sensors wiki page
pinda	Automatic leveling sensors: PINDA (inductive). See Leveling Sensors wiki page
akp	Automatic leveling sensors: AKP (DYI). See Leveling Sensors wiki page
zmin	Variant for connecting automatic leveling sensors that replaces Z endstop. See Leveling Sensors wiki page
fs	Simple filament sensor
sfs	BTT Smart Filament Sensor (motion)
e0fan	Secondary controlled fan can be used for automatic hotend heating (on BTT SKR mini MZ or E3 Turbo boards)
2e	Dual extrusion on BTT SKR E3 Turbo board: 2 extruders
2to1	Dual extrusion on BTT SKR E3 Turbo board: 2-to-1 (non-mixing)
2mix	Dual extrusion on BTT SKR E3 Turbo board: 2-to-1 (mixing)

• Slim menus
• Manual Mesh Bed Leveling (if no sensors used)

• Full set of LCD menus
• Additional flash space allowed to enable more features:
  • Advanced pause function (including park head function)
  • Filament load/unload
  • NeoPixel support (max 16 leds)
  • Tramming assist
  • PID tuning menus
  • Power failure Detect with BTT UPS module
  • Controlling state of PSU with BTT Relay Module V1.2
  • BTT Smart Filament Sensor supported (disabled by default)

• Full set of LCD menus
• Additional flash space allowed to enable more features:
  • Advanced pause function (including park head function)
  • Filament load/unload
  • NeoPixel support (max 16 leds)
  • Tramming assist
  • PID tuning menus
  • Power failure Detect with BTT UPS module
  • Controlling state of PSU with BTT Relay Module V1.2
  • BTT Smart Filament Sensor supported (disabled by default)

• Full set of LCD menus
• Additional flash space allowed to enable more features:
  • Advanced pause function (including park head function)
  • Filament load/unload
  • NeoPixel support (max 16 leds)
  • Tramming assist
  • PID tuning menus
  • Power failure Detect with BTT UPS module
  • Controlling state of PSU with BTT Relay Module V1.2
  • BTT Smart Filament Sensor supported (disabled by default)
• Possible support for dual extrusion:
  • 2e: 2 independent nozzles / heaters / temperature sensors
  • 2to1: single nozzle / heater / temperature sensor. Non-mixing, only one filament at a time.
  • 2mix: single nozzle / heater / temperature sensor. Mixing hotend, multiple filaments mixed in the hot zone.