FLY-LLL Flux Buffer Configuration Tool
This tool connects to the FLY-LLL Flux Buffer control board via the browser Web Serial API to read device information and modify the device's local parameters. Serial communication uses 9600 baud.
Please use Chrome or Edge browsers that support Web Serial, and allow the webpage to access the device's serial port.
After connecting, the tool will first display reference default values, then replace them item by item with the device's currently saved values using the info response. If the firmware version is not recognized on the first attempt, the tool will automatically resend version, with up to 3 attempts. During the connection, sensor status is automatically read approximately once every 1 second; you can also click "Refresh Now" to read immediately or pause automatic refreshing. The page displays sensors grouped by motor sensor and buffer sensor.
When not connected, you can click "Flash Firmware" and select a local BIN file; after connecting, if the firmware version is v2.0.0 or higher, "Enter Flashing Mode" will be displayed, and the tool will first restart the device into flashing mode.
- Switching
system_modewill save the settings and automatically restart the device; the serial port will temporarily disconnect. Please wait for the restart to complete before reconnecting. - This tool does not provide Klipper host filament change configuration; do not add unverified serial port configurations directly to the printer configuration file.
Test Instructions: Sensor and Single-Channel Test
Before connecting or unplugging the control board data cable, organizing the wiring harness, or inspecting terminals, please completely turn off the printer and disconnect the power supply. Do not plug or unplug the wiring harness, rearrange the connector wire order, or touch the terminals while powered on.
Connect Device
- Connect the FLY-LLL Flux Buffer controller board and the computer using a USB Type-C data cable that supports data transfer.
- Click Connect device below and select the serial port corresponding to the FLY-LLL Flux Buffer controller board in the browser popup.
- After modifying a numerical parameter, press Enter, leave the input field, or click Save Parameters to send; dropdown options are sent immediately. The save button waits for the device to write and then automatically confirms using the
inforeadback. The sending result can be viewed in the serial log. - Wait for the serial log to show the
inforeadback and confirm the page displays the device values, then click Disconnect the device to proceed with a local filament feeding test.
Parameter Description
After the tool connects, it will prioritize displaying the values saved on the device; the "Restore Default Values" in the table below is only for reference, and the actual values returned by the device may differ.
| Parameter | Restore Default Value | Function |
|---|---|---|
| Motor Current | 800mA | Set the drive current for both motor channels (can enter 0–2000mA) |
| Normal Speed | 35mm/s | Set the normal feed and retract speed |
| Fast Speed | 100mm/s | Set the speed for long-distance movements |
| Startup Acceleration | 100mm/s² | Set the acceleration when the motor starts from a stopped state |
| Acceleration When Entering Fast Speed | 50mm/s² | Read-only reference item; currently not returned by info, and the tool does not provide editing |
| Forward Timeout | 60000ms | Protection is triggered after continuous forward movement reaches this time |
| Microstep Subdivision | 16 | Read-only reference item; currently not returned by info, and the tool does not provide editing |
| Runout Distance | Not set | View or set the runout detection distance, in mm; "Clear Learned Value" will send runout_distance clear |
| Filament Mode | refill | Choose between automatic refill and multi-color mode |
| System Mode | multi | Choose between single-main-control and multi-main-control mode |
| Channel Direction | 0 (Normal) | Reverse the motor direction of channel 0 or channel 1 separately |
| Buzzer | On (1) | Turn the filament-out and error notification sound on or off |
Restoring default parameters will overwrite the settings saved on the device; if the current system mode is not multi, the device will also automatically restart after saving. After execution, please recheck the motor direction, feed speed, and buffer trigger sequence.