Flashing firmware on the Sapphire Pro is straightforward because of its bootloader:
The TwoTrees Sapphire Pro is a CoreXY 3D printer known for its rigid structure and impressive speed capabilities right out of the box. However, its stock firmware often prevents it from reaching its true potential. If you are looking to improve print quality, reduce noise, or add advanced features like mesh bed leveling and higher speeds, updating the firmware is the single best upgrade you can perform.
Flashing the Two Trees Sapphire Pro is incredibly simple because the MKS Robin Nano bootloader looks for firmware updates directly on the MicroSD card.
RepRapFirmware (RRF) is less common but highly regarded by advanced makers who modify their Sapphire Pro with Duet boards or use the Fly-CDY/MKS boards compatible with RRF. Why It Excels
Like Klipper, you can change settings via text files without compiling code.
if you want the quickest path away from the buggy factory software with minimal tinkering.
Ensure it is named correctly (usually robin_nano.bin or robin_nano35.bin depending on the board) TwoTrees Wiki .
If you tell me which you have (e.g., Robin Nano v1.3, v2) and if you have a Raspberry Pi , I can help you choose the best configuration file for your specific setup. Share public link
Some users prefer modified versions that combine Two Trees and Flying Bear firmwares to simplify menus and enable "on-the-fly" flow rate adjustments. Step-by-Step Installation Guide (Marlin)
If make flash doesn't work (common on Robin Nano boards), use the provided Python script ( update_mks_robin.py ) to generate the correct .bin file.
Upgrading from the stock firmware unlocks features that drastically change your printing experience:
Which does your printer have? (e.g., MKS Robin Nano v1.1, v1.2, or a v2.0 upgrade?)
You can change your printer configuration file in a web browser without recompiling or reflashing firmware.
Unlocks features like Linear Advance (similar to Klipper's Pressure Advance) and Manual Mesh Bed Leveling.
is widely considered the best choice in 2026. It offloads complex calculations to a more powerful host like a Raspberry Pi, enabling much higher print speeds without losing quality. Key Features
Most Sapphire Pro versions use the MKS Robin Nano board. To update: