Sunlu T3 Firmware -

Select the matching environment for your chip (e.g., BOARD_MKS_ROBIN_NANO_V3 or specific Sunlu targets if available in community branches).

or [probe] settings to handle the stock auto-bed leveling sensor.

configuration to calibrate your E-steps (rotation distance) for the T3's dual-gear extruder. Troubleshooting Common Firmware Flashing Issues sunlu t3 firmware

Do you prefer sticking with standard , or do you want to manage your printer over Wi-Fi ? Share public link

Open the folder in VS Code, use the Auto Build Marlin extension to select your correct environment (based on your motherboard chip), and click . Select the matching environment for your chip (e

If the motherboard does not recognize the file, rename it to something unique like update123.bin . Sunlu boards will not flash the same filename twice. Flash the Machine: Turn off the printer. Insert the MicroSD card into the printer's slot. Turn on the printer.

Always, always back up your original firmware. Before you flash anything new, use a tool like stm32flash (Linux) or STM32CubeProgrammer to read the existing .bin off your board. That file is your lifeline if a flash goes wrong. Happy printing. Sunlu boards will not flash the same filename twice

Use the Klipper terminal command make menuconfig to compile a firmware file configured for the Sunlu T3's specific microcontroller architecture.