BIGTREETECH V2.0 ADXL 345 Accelerometer Board User Manual

BIGTREETECH V2.0 ADXL 345 Accelerometer Board

Revision Log

Product Profile

BIGTREETECH ADXL345 V2.0 is a module for printer resonance compensation. It can communicate through USB, greatly simplifying wiring.

Feature Highlights

• The board has a reserved BOOT button for easy firmware updates.
• Reserved solder points enable users to customize wiring easily.
• The USB port has an added ESD protection chip to prevent the MCU from being damaged by static electricity through the USB.

Specifications

• Dimensions

• 33.25 x 15.5mm

• Installation Dimensions

• See BIGTREETECH ADXL345 V2.0-SIZE.pdf for details.

• Microprocessor

• RP2040 Dual ARM Cortex-M0+ @ 133MHz

• Input Voltage

• DC 5V

• Logic Voltage

• DC 3.3V

• Communication with PC

• USB2.0

• Sensor

• ADXL345

• Sensor Communication

• 4Line SPI
  Resolution

• Up to 3.9mg/LSB.

• Output Data Rate

• 0.1-3200Hz

• Sensor Operating Temperature Range

• -40℃ to +85℃

Firmware Support
This product currently only supports Klipper firmware.

Dimensions Peripheral Interfaces Pin Description

Interface Introduction Connecting to BTT Pi V1.2 (Type-C)

Connecting to Manta M8P (Type-C)

Connecting to Manta M8P (Soldering Wires)

Klipper Firmware Compiling Klipper Firmware

1. Connect to CB1/Raspberry Pi via SSH and enter the following commands cd ~/klipper/ make menuconfig
   Configure the firmware as shown in the provided image (update Klipper firmware to the latest version if options are not available).

   • Enable extra low-level configuration optionsMicro-controller
   • Micro-controller Architecture (Raspberry Pi RP2040) —> Bootloader offset (No bootloader) —>
   • Flash chip (W25Q080 with CLKDIV 2) —> Communication interface (USB) —>

2. After configuration, press q to exit, and select Yes when prompted to save.

3. Enter make to compile the firmware. The resulting klipper.bin file will be in the home/pi/klipper/out folder. This can be directly downloaded to your computer from the SSH software’s left panel.

Firmware Update via DFU
Raspberry Pi or CB1 update via DFU.

1. Hold the Boot button and connect the board to Raspberry Pi/CB1 via Type-C cable to enter DFU mode.
2. Enter lsusb in the SSH terminal to query the DFU device ID.
3. Enter cd klipper navigate to the Klipper directory, and enter make flash FLASH_DEVICE=2e8a:0003 start flashing the firmware (Note: Replace 2e8a:0003 with the actual device ID found in the previous step.)
4. After flashing, enter ls /dev/serial/by-id/ to query the device’s Serial ID (only applicable for USB communication, not for CANBus).
5. For USB communication, you don’t need to press the Boot button for subsequent updates. Enter the following command to flash the firmware make flash FLASH_DEVICE=/dev/serial/by-id/usb-Klipper_rp2040_4550357128922FC8-if00
   (Note: replacing /dev/serial/by-id/xxx with the actual ID found in the previous step).

Configuring Klipper

1. Download the sample-bigtreetech-adxl345-v2.0.cfg config file from: https://github.com/bigtreetech/ADXL345
2. Upload to the Configuration Files.
3. In printer.cfg, add: [include sample-bigtreetech-adxl345-v2.0.cfg]
4. Set the correct ID number for your board.(USB serial or canbus)
5. Configure the module’s functions according to the instructions in the link below
   https://www.klipper3d.org/Config_Reference.html#adxl345

The axes_map parameter needs to be set according to the direction of the module installation and the movement direction of the printer. The first parameter represents the direction of the accelerometer module corresponding to the axis when the printer’s X-axis moves in the positive direction (the silk screen on the module shows the direction of each axis of the module), and the second parameter represents the direction of the accelerometer when the Y-axis moves in the positive direction.

Assembly
Note: Avoid overtightening screws during installation to prevent damage. Example using the Voron StealthBurner

Method 1
Install on the side bracket with the dual holes (matches official spacing).

Method 2
Use screws through the PCB and rubber ring on the heater block as shown.

If you need further resources for this product, you can find them at
GitHub. If you cannot find what you need, you may contact our after-sales support(service005@biqu3d.com).
If you encounter any other problems during use or have suggestions or feedback, please contact us. Thank you for choosing BIGTREETECH products.

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