{
  "id": "eryone/er-20",
  "vendor": "Eryone",
  "model": "ER-20",
  "aliases": [
    "ER-20 (2021)"
  ],
  "category": "3d-printer",
  "summary": "Klipper ships a config for this printer (config/printer-eryone-er20-2021.cfg); its controller board is flashed with the Klipper firmware (MCU: STM32F103).",
  "identifiers": {
    "chips": [
      "STM32F103"
    ]
  },
  "status": "open-firmware",
  "projects": [
    {
      "name": "Klipper (printer-eryone-er20-2021.cfg)",
      "url": "https://github.com/Klipper3d/klipper/blob/master/config/printer-eryone-er20-2021.cfg",
      "kind": "firmware",
      "license": "GPL-3.0"
    }
  ],
  "install": [
    {
      "project": "Klipper",
      "method": "usb-bootloader",
      "guide": "https://www.klipper3d.org/Installation.html",
      "difficulty": "medium",
      "tools": [
        "Raspberry Pi or other Linux computer (runs the Klipper host)",
        "USB cable"
      ],
      "brick_risk": "low",
      "reversible": "partial",
      "notes": "Board-specific build and flashing steps are in the header of config/printer-eryone-er20-2021.cfg. Going back needs the vendor's stock firmware file, when the vendor publishes it."
    }
  ],
  "provenance": {
    "sources": [
      "klipper"
    ]
  },
  "updated": "2026-10-17"
}