diff --git a/artillery-sidewinder-x2/README.md b/artillery-sidewinder-x2/README.md
index b089fe1..e07b0dc 100644
--- a/artillery-sidewinder-x2/README.md
+++ b/artillery-sidewinder-x2/README.md
@@ -77,6 +77,68 @@ BED_MESH_OUTPUT
 |-----------|---------------|---------------|------------------|-----------------------|
 | Geeetech  | --            | --            | --               | --                    |
 
+## Klipper firmware update
+### Printer preparation
+1. Shutdown the printer
+
+2. Unplug the electrical wall socket
+
+3. Unplug the USB cable labelled `OPERATION` from printer
+
+4. Set the top switch to `UPDATE` position \
+![Switch in `UPDATE` position](images/aswx2-switch-in-update-position.jpg)
+
+5. Plug the USB cable labelled `UPDATE` to the printer
+
+
+### Firmware build and update
+1. SSH to the ASWX2 Raspberry
+
+2. Browse to Klipper directory:
+```
+#> cd ~/klipper
+```
+
+3. Git the last version of the Klipper firmware:
+```
+#> git pull
+```
+
+4. Check the firmware build configuration 
+```
+#> make menuconfig
+```
+![Klipper firmaware build configuration](images/aswx2-klipper-firmware-config.png)
+
+5. Build the firmaware:
+```
+#> make
+```
+
+6. Check printer's Ruby board is in DFU mode and can be updated 
+```
+#> lsusb
+```
+![Ruby board in DFU mode](images/aswx2-ruby-board-DFU-mode-USB.png)
+
+7. Note the Ruby board device ID. In example above: `ID: 0483:df11`
+
+8. Flash the new firmware to the printer's Ruby board using the above device ID:
+```
+#> make flash FLASH_DEVICE=0483:df11
+```
+![Klipper firmware flash outputs](images/aswx2-klipper-flash-output.png)
+
+### Switch back printer to operation mode
+1. Unplug the USB cable labelled `UPDATE` from printer
+
+2. Set the top switch to `OPERATION` position \
+![Switch in `OPERATION` position](images/aswx2-switch-in-operation-position.jpg)
+
+3. Plug the USB cable labelled `OPERATION` to the printer
+
+4. Unplug the electrical wall socket
+
 ## Resources / Links
 
 * [Runout sensor bracket SIDEWINDER X2 by LeLudoLAb - Thingiverse](https://www.thingiverse.com/thing:5027268)
diff --git a/artillery-sidewinder-x2/images/aswx2-klipper-firmware-config.png b/artillery-sidewinder-x2/images/aswx2-klipper-firmware-config.png
new file mode 100644
index 0000000..3dbc9cf
Binary files /dev/null and b/artillery-sidewinder-x2/images/aswx2-klipper-firmware-config.png differ
diff --git a/artillery-sidewinder-x2/images/aswx2-klipper-flash-output.png b/artillery-sidewinder-x2/images/aswx2-klipper-flash-output.png
new file mode 100644
index 0000000..e94daf8
Binary files /dev/null and b/artillery-sidewinder-x2/images/aswx2-klipper-flash-output.png differ
diff --git a/artillery-sidewinder-x2/images/aswx2-ruby-board-DFU-mode-USB.png b/artillery-sidewinder-x2/images/aswx2-ruby-board-DFU-mode-USB.png
new file mode 100644
index 0000000..098e478
Binary files /dev/null and b/artillery-sidewinder-x2/images/aswx2-ruby-board-DFU-mode-USB.png differ
diff --git a/artillery-sidewinder-x2/images/aswx2-switch-in-operation-position.jpg b/artillery-sidewinder-x2/images/aswx2-switch-in-operation-position.jpg
new file mode 100644
index 0000000..65a64cc
Binary files /dev/null and b/artillery-sidewinder-x2/images/aswx2-switch-in-operation-position.jpg differ
diff --git a/artillery-sidewinder-x2/images/aswx2-switch-in-update-position.jpg b/artillery-sidewinder-x2/images/aswx2-switch-in-update-position.jpg
new file mode 100644
index 0000000..d8fc4b0
Binary files /dev/null and b/artillery-sidewinder-x2/images/aswx2-switch-in-update-position.jpg differ