Marlin 2.0.3

Boards / Pins

• Support for E4d@BOX mainboard
• Defined RX/TX pins for up to 8 extruders

Configuration

• Auto-assign stallGuard DIAG pins for X2/Y2/Z2/Z3/Z4
• Add Thermistor 21 for PT100 with 3.3V logic

Hosts and UI

• Allow combined use of wheel with touch buttons

Issues Patched

• Fix manual bed leveling with multiple extruders
• Prevent lengthy SD access from resetting ESP32
• Fix tool-change breaking interactive bed leveling
• Fix defined fan reckoning macro _HAS_FAN
• Fix M48 compile error
• Fix G60/G61 with more than 8 slots

Optimizations

• Use less SRAM for L64xx stepper drivers

For Developers

• Refactor and clean up heater watch
• Refactor and clean up print job timer autostart

Known Issues

• M18 / M84 fails to turn off E steppers. Fixed in 2.0.4.
• See 2.0.4 release notes for others