Sunlu T3 Firmware [top] May 2026
Sunlu T3 Firmware: Comprehensive Guide & Technical Reference
1. Overview
The Sunlu T3 is a Cartesian FDM 3D printer (a clone of the Artillery Hornet / modified i3 design). It runs on a 32-bit board (usually a proprietary STM32-based variant) with a touchscreen UI. Unlike Marlin-based printers with LCD12864, the T3’s firmware is a specialized Marlin fork integrated with a GUI for its color touch display.
2. Identifying Your Current Firmware Version
Before updating, check your current version: sunlu t3 firmware
Power Loss Recovery: In the event of a blackout, the firmware saves the exact coordinates of the print head to the SD card, allowing you to resume precisely where you left off once power returns. Sunlu T3 Firmware: Comprehensive Guide & Technical Reference
3. Official Firmware Sources
Sunlu does not maintain a public GitHub repository. Official firmware is distributed via: but it is usually locked down
Error 3: The extruder is moving backward (Filament pushes out instead of in)
Fix: This is a classic Sunlu T3 bug in v1.0.2 firmware. Update to v1.0.4 or reverse the extruder motor plug on the mainboard.
Why the Sunlu T3 Firmware is Unique (And Frustrating)
Unlike Creality printers, which have massive community support, the Sunlu T3 suffers from a fragmented firmware ecosystem. Sunlu does not maintain a centralized, up-to-date GitHub repository. The firmware that ships from the factory is often version v2.0.8.2 or v2.0.8.26 (based on Marlin), but it is usually locked down, missing thermal runaway protections (ironically) or advanced motion settings.
