Anycubic RV1106 Tools

Tools and utilities for Anycubic RV1106-based 3D printers.

Supported Printers

Model	Code	Model ID
Kobra 2 Pro	K2P	20021
Kobra 3	K3	20024
Kobra S1	KS1	20025
Kobra 3 Max	K3M	20026
Kobra 3 V2	K3V2	20027
Kobra S1 Max	KS1M	20029

Components

rkmpi-encoder

Hardware H.264/JPEG encoder using the RV1106 Video Encoder (VENC).

• USB camera capture (V4L2 MJPEG/YUYV)
• Hardware H.264 encoding for streaming
• Hardware MJPEG encoding for snapshots
• Display capture with hardware rotation (RGA)
• Built-in HTTP/MQTT/RPC servers
• Timelapse with hardware VENC encoding (no ffmpeg dependency)

# Quick start
cd rkmpi-encoder && make dynamic
./rkmpi_enc --help

h264-streamer

HTTP streaming server with web UI for Rinkhals custom firmware.

• MJPEG and H.264 FLV streaming endpoints
• Multi-camera support - up to 4 USB cameras with individual settings
• Display capture for remote LCD viewing
• Touch control - interact with printer UI remotely
• Web control interface with live preview
• Camera controls - real-time V4L2 adjustments (brightness, contrast, exposure, etc.)
• Moonraker webcam integration
• Auto frame skipping based on CPU load
• Timelapse recording - native Anycubic slicer support + advanced Moonraker mode
• Timelapse management - browse, preview, download, delete recordings

# Endpoints
/stream          # MJPEG multipart stream
/snapshot        # Single JPEG frame
/flv             # H.264 in FLV container
/display         # LCD framebuffer stream
/control         # Web UI
/timelapse       # Timelapse management

fb-status

Framebuffer status display utility for showing messages on the printer LCD.

• Direct framebuffer rendering with TTF fonts
• Screen save/restore
• Pipe mode for long-running scripts
• Auto screen orientation per printer model
• Printer busy/free API integration

# Quick examples
fb_status show "Calibrating..."
fb_status show "Error!" -c red
fb_status pipe -b << 'EOF'
show Starting process...
color yellow
show Step 1 of 3
EOF

knowledge

Protocol documentation, research notes, and captures.

• Timelapse RPC protocol
• USB camera bandwidth analysis
• Display standby/wake control
• CPU optimization techniques

Hardware Specifications

Component	Specification
SoC	Rockchip RV1106
CPU	ARM Cortex-A7 @ 1.2GHz (single core)
Architecture	ARMv7-A with NEON SIMD
RAM	256MB DDR3
Video Encoder	H.264/H.265 up to 2304x1296 @ 30fps
RGA	2D graphics accelerator
USB	USB 2.0 OTG

Releases

Pre-built binaries and SWU packages are available on the Releases page.

See CHANGELOG.md for detailed release notes.

Component	Latest Release	Assets
rkmpi-encoder	v1.2.0	rkmpi_enc binary
h264-streamer	v1.3.0	SWU packages for all models
fb-status	v1.0.0	fb_status binary

Creating a Release

# Update version and create tag
echo "1.0.1" > h264-streamer/VERSION
git add -A && git commit -m "Bump h264-streamer to 1.0.1"
git tag h264-streamer/v1.0.1
git push origin main h264-streamer/v1.0.1

Building

Prerequisites

• RV1106 ARM cross-compilation toolchain
• Make

Build Commands

# Build encoder
cd rkmpi-encoder && make dynamic

# Build framebuffer utility
cd fb-status && make

# Build h264-streamer SWU
./scripts/build-h264-swu.sh KS1 ./dist

Documentation

• CLAUDE.md - Development guide with build system, deployment, and internal documentation

Related Projects

• Rinkhals - Custom firmware for Anycubic printers

License

GPL v3 - See LICENSE

Acknowledgments

• RockChip for the RV1106 SDK
• The Rinkhals project for custom firmware support
• stb_truetype for font rendering