Usage of XIAO RP2040 Mcu : https://wiki.seeedstudio.com/XIAO-RP2040/

for Input shaper acclerometer for Klipper firmware of 3d printers. For use with ADXL345 pcbs. https://www.klipper3d.org/Measuring_Resonances.html

SSH from Klipper directory on PI.

cd ~/klipper

Use command : make menuconfig Setup with below settings. Press Q to save.

• uncheck extra low-level options
• Architecture: Raspberry Pi RP2040
• Communication Interface: USB

Enter in SSH :

make clean
make

https://winscp.net/eng/index.php

Using WINSCP connect to PI via local IP. Navigate to /klipper/out folder Download klipper.uf2 to known directory on PC

While holding "B" Button , connect XIAO to USB to PC that has "klipper.uf2" file. More info: https://wiki.seeedstudio.com/XIAO-RP2040/

After XIAO is available on PC.

Copy "klipper.uf2" to XIAO.

Once complete, disconnect from PC.

Connect XIAO to Raspberry Pi. From SSH , use command :

ls /dev/serial/by-id/*

3d printer MCU and XIAO as Klipper should display. XIAO is now flash with klipper FM.

Images are of ADXL wired for VCC , NOT 3v3. Wire accordingly.

Use this resource if unsure:

https://klipper.discourse.group/t/raspberry-pi-pico-adxl345-portable-resonance-measurement/1757

Find Xiao serial by using :

ls /dev/serial/by-id/*

Enter this address in the "mcu" section below within your printer config.

Save and restart after editing printer.cfg file.

Instructions with more detail are found at: https://www.klipper3d.org/Measuring_Resonances.html

ACCELEROMETER_QUERY will fail on first attempt. This is normal.

Use

ACCELEROMETER_QUERY 

in console to verify communication to ADXL : Klipper should report:

Use

MEASURE_AXES_NOISE

to measure noise of ADXL.