Before clicking any firmware link, you must know which motherboard you have. Installing the wrong firmware will brick your printer (black screen, no boot).
Turn off your printer, open the bottom case, and look at the green circuit board:
| Motherboard Model | Processor | Firmware Filename | Default LCD |
| :--- | :--- | :--- | :--- |
| MKS Robin Nano V1.2 | STM32F407ZGT6 | Robin_nano35.bin | DGUS (480x320) |
| MKS Robin Nano V1.3 | STM32F407VGT6 | Robin_nano43.bin | DGUS (800x480) |
| MKS Robin Nano V2.0 | STM32F407VGT6 | Robin_nano_v2.bin | TFT35 Touch |
If you see "MKS Robin E3" or "SKR" boards, you have a modified printer—do not use standard Two Trees links.
Two Trees maintains an official GitHub page. This is the primary two trees sapphire pro firmware link you should trust. two trees sapphire pro firmware link
Fix: This is a configuration error in the downloaded firmware. You cannot fix it without recompiling Marlin. Instead, download a different community build or invert the axis limits via G-code (send M569 S1 X to reverse X motor).
When you visit the official firmware link, you will see several .bin files. Here’s what they mean:
| File Name | Board Target | Description |
|-----------|--------------|-------------|
| SapphirePro_Nano_V3_noBLTouch.bin | Robin Nano V3 | Firmware without auto-leveling |
| SapphirePro_Nano_V3_BLTouch.bin | Robin Nano V3 | 3D Touch / BLTouch enabled |
| SapphirePro_Nano_V4_noBLTouch.bin | Robin Nano V4 | Stock firmware for newer units |
| SapphirePro_Nano_V4_BLTouch.bin | Robin Nano V4 | BLTouch version for V4 |
Critical: Do not flash V3 firmware on a V4 board, or vice versa. Check your mainboard version by opening the electronics case. Before clicking any firmware link, you must know
The TwoTrees Sapphire Pro (SP-3) remains a beloved CoreXY 3D printer due to its linear rails and sturdy frame. However, its stock firmware often leaves users wanting more control, better thermal management, and modern features like auto-bed leveling.
Whether you are trying to fix hotend temperature overshoots or add a BLTouch sensor, locating the correct firmware links and knowing how to install them is essential. Finding the Right Firmware for Your Setup
The TwoTrees Sapphire Pro typically ships with an MKS Robin Nano motherboard (versions 1.1 or 1.2). Because the stock Robin firmware is somewhat closed and rigid, the community has developed several fantastic open-source alternatives.
The three primary avenues to upgrade your Sapphire Pro firmware include: 1. Community Marlin 2.0 with Custom GUI Critical: Do not flash V3 firmware on a
If you want to maintain the beautiful, colorful touch-screen interface of your stock Sapphire Pro while fixing core issues like bed dimensions and hotend overshoots, community-compiled Marlin 2.0 with the LittlevGL interface is your best option.
The Go-To Repository: You can download the pre-configured project files and assets on the quentinDeroo Mks-Robin-Nano Sapphire PRO GitHub. This branch successfully addresses hotend overshoots and aligns bed dimensions accurately with default Cura profiles.
Alternative UI Build: Another actively sought archive for the Robin Nano board that includes full color GUI support can be found at the RolfZuckowskiUltras TwoTrees Sapphire GitHub. 2. Advanced Marlin 2.1 (BLTouch & Custom Mods)
If you have heavily modified your Sapphire Pro by adding a BLTouch, upgrading to TMC2209 silent stepper drivers, or moving to a direct-drive extruder, standard pre-compiled firmware will not suffice. You will need to compile your own firmware or find a custom fork. GitHubhttps://github.com
