1. Overview IIIP is a brand of entry-to-mid-level consumer FDM 3D printers (e.g., IIIP EDM-3, IIIP C-12, IIIP Mars series). Most IIIP printers are built on open-source platforms—typically Marlin Firmware (for Cartesian/Direct Drive) or Klipper (on newer or modified units). The stock firmware is often a branded, customized version of Marlin 1.x or 2.x. ⚠️ Important : IIIP does not maintain a public, unified firmware repository. Stock firmware is usually provided via SD card or direct file from the seller/reseller. 2. Identifying Your IIIP Printer & Firmware | Printer Model | Board Common | Stock FW Base | LCD Type | |---------------|--------------|---------------|-----------| | EDM-3 / EDM-4 | MKS Gen L / Robin Nano | Marlin 2.0.x | 12864 / Touch (DWIN) | | C-12 | MKS Robin Nano V3 | Marlin 2.1.x | TFT35 / Touch | | Mars (resin) | MKS Robin Nano | Marlin 2.0 (LCDC) | 3.5″ Touch |