Your lemontron will run Mainsail OS on a Raspberry Pi. You’ll install the operating system, configure SSH and WiFi settings, and update the system. Then, we’ll guide you through flashing the firmware on your SKR Pico board and finalizing the setup on your Raspberry Pi.

Begin by downloading the latest configuration files and firmware:

config.zip klipper.uf2

Burn an OS onto your MicroSD

Burn Mainsail OS via Raspberry-Pi-Imager. Make sure you configure your SSH key and WiFi settings so that you can SSH as soon as it powers up.

SSH into the Raspberry Pi and bring the OS up-to-date:

sudo apt update && sudo apt upgrade

Flash the SKR Pico

  1. Apply the jumper to the BOOT pins on the SKR Pico (located in the center, under the “TE” in “BIGTREETECH”).
  2. Hold down the BOOT button on the SKR Pico and connect the SKR Pico to your computer over USB-C.
  3. Drag the klipper.uf2 file to the PICO drive that appears. Wait for the drive to disappear and reappear and then disconnect.

Set up Raspberry Pi

  1. Open up the Raspberry Pi webpage by navigating to the network name of the Raspberry Pi in your browser. If you named your printer “lemontron” then your URL would be http://lemontron.local
  2. Update everything!
  3. Click on the “Machine” tab (the last one) and upload the Klipper Config files.

Customization

There is so much more that you can do, so feel free to explore Positron’s Config Documentation.