SyncCraft
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Link your server with your mobile device to have players experience things based on the physical and internal detections from the device.
Fabric is a mod loader for versions 1.14+ of Minecraft, particularly popular for client side and optimization mods.
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About
Description
SyncCraft
SyncCraft turns your phone into a Minecraft world controller. Every sensor on your phone maps to something in the game — tilt to shift gravity, point your camera at the sky, shake to cause earthquakes. One person with a phone controls the experience for everyone on the server.
The mod comes with an Android companion app and a built-in web control panel. Everything connects over a single port.
Download the Android Companion App
Features
Sensors
| Phone Sensor | In-Game Effect |
|---|---|
| Tilt / Gyroscope | Shifts gravity for players and entities (independently toggleable). Tilt sideways to push, face-down for low gravity. Camera lean and player model tilt to match. Fall damage reduced in low-g. Decoration entities (item frames, paintings, leads, armor stands) are protected from gravity effects. |
| Camera | Streams to the skybox ceiling. Look up and see the real world. Smooth fade-in/out with vignette blending. |
| Shake | Earthquake — camera shakes, entities pushed, optionally shatters nearby glass and ice. |
| Flashlight | On = Night Vision for all players. Off = removed. |
| Battery Level | Above 20% = clear. Below 20% = rain. Below 5% = thunderstorm. |
| Ambient Light | Room brightness maps to time of day. Dark room = midnight, bright room = noon. |
| Proximity | Phone face-down or in pocket = all players go invisible and sneak. |
| Barometer | Walking with phone causes subtle altitude bobbing on entities. |
| Charging | Plugged in = Regeneration I for all players. |
| Microphone | Voice plays from the sky with echo and spatial audio. Muffled underground. |
| Do Not Disturb | Mutes all player chat server-wide. |
| Notifications | Spawns a temporary glowing silverfish near each player. |
| Screenshot | Flashbang effect on all clients + auto-saves an in-game screenshot. |
| Power Save | Caps all clients to 15 FPS with an on-screen indicator. |
Grab Hand — Drag players around the world from the map view. Picked-up players float above terrain and receive Slow Falling on release.
World View — A live minimap streams to your phone or browser showing terrain, player positions, health, food, XP, weather, and time.
Requirements
- Minecraft 1.21.6 through 1.21.11 (Fabric) WIP
- Fabric Loader 0.18.5+
- Fabric API (matching your MC version)
- Java 21+
- All players need the mod installed (server + client)
Setup
Installation
Place the SyncCraft .jar and Fabric API into the mods/ folder on the server and all clients.
Server
The mod automatically starts a WebSocket + HTTP server on port 25566. No extra setup needed.
Connection
Android App
- Download the companion app from synccraft.lukecgg.com
- Install the APK on your Android device (8.0+)
- Enter your server IP and port (default 25566)
- Run
/synccraft pairon the server to get a 6-digit code - Enter the code in the app
- Future connections auto-pair without a code
Web Panel
- Open
https://YOUR_SERVER_IP:25566/in a browser - Accept the self-signed certificate warning
- Run
/synccraft pairand enter the code - HTTPS is required for gyro, camera, and mic access on mobile browsers
Usage
Toggle sensors, camera, and mic from the app dashboard or web panel. The Android app runs as a foreground service and keeps streaming with the screen locked.
Commands
All commands require operator permissions (level 2).
| Command | Description |
|---|---|
/synccraft pair |
Generate a 6-digit pairing code (60 second expiry) |
/synccraft disconnect |
Disconnect the paired device |
/synccraft status |
Show connection and feature status |
/synccraft reload |
Reload config from disk |
/synccraft config <feature> <true/false> |
Toggle a feature |
Toggleable features: gravity, gravity_players, gravity_entities, skybox, darkness, flashlight, shake, battery, ambient, proximity
Configuration
All settings live in config/synccraft.json on the server.
| Setting | Default | Description |
|---|---|---|
websocketPort |
25566 | Connection port |
gravityEnabled |
true | Master gravity toggle |
gravityPlayersEnabled |
true | Gravity effects on players (camera tilt, push, low-g) |
gravityEntitiesEnabled |
true | Gravity effects on non-player entities (mobs, items, etc.) |
gravitySensitivity |
1.0 | Tilt force multiplier |
shakeThreshold |
1.5 | Minimum shake intensity |
shakeBreaksBlocks |
false | Earthquakes break glass/ice |
batteryDuskThreshold |
20 | Battery % that triggers rain |
pairCodeExpirySeconds |
60 | Pairing code lifetime |
Every sensor feature can be toggled individually through the config or /synccraft config.
Networking
- Single port handles HTTP, HTTPS, and WebSocket connections
- Self-signed SSL certificate generated automatically
- Device trust system — pair once with a code, auto-reconnect after that
- One controller at a time with device takeover support
- Rate limiting and idle timeouts built in
- All effects revert cleanly when the phone disconnects
Platform Comparison
| Feature | Android App | Web Browser |
|---|---|---|
| Tilt / Gyroscope | Yes | Yes (HTTPS required) |
| Camera | Yes | Yes (HTTPS required) |
| Shake | Yes | Yes |
| Flashlight | Yes | Yes |
| Battery Level | Yes | No |
| Ambient Light | Yes | Yes |
| Proximity | Yes | No |
| Barometer | Yes | No |
| Charging | Yes | No |
| Microphone | Yes | Yes (HTTPS required) |
| Do Not Disturb | Yes | No |
| Notifications | Yes | No |
| Screenshot | Yes | No |
| Power Save | Yes | No |
| Grab Hand | Yes | Yes |
| World View | Yes | Yes |
| Background Streaming | Yes (foreground service) | No (tab must stay open) |
The Android app provides the fullest experience. The web panel works well for gyroscope, camera, mic, and map controls but cannot access system-level features like battery, flashlight, notifications, DND, or power save mode.
Notes
- Port 25566 must be reachable from your phone or browser. Forward it if you're on a remote server.
- The mod is built for one controller affecting all players — best suited for party games, streams, or playing with friends.
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-
Leaning Players POV Tilts with world tilt -
I'll take that. Pickup and move players with a supernatural power -
I need to charge this Heaps of synced actions for your phone through the android app -
Troll your friends from your phone! So many ways to mess with your friends on a server or through a server.
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