MotionDetected
EventTriggered when motion is detected
| Parameter | Type |
|---|---|
| motionAreas | number |
Extensions
MIT App Inventor
Kodular
Niotron
Android Builder
Thunkable
Motion Detection
Detect real-time motion with OpenCV and highlight active areas using the device camera.
18 September 2026v2.0
Free
AI/ML
About
Motion Detection extension lets you build security and automation experiences by running OpenCV-powered motion detection inside your app. Highlight motion areas with rectangles, react to detection events, and switch between cameras while managing detection lifecycle easily.
Features
- Real-time motion detection using OpenCV
- Automatic rectangle overlays on detected motion areas
- MotionDetected, CameraError, and Error events
- Initialize detection inside any arrangement
- Programmatic start and stop controls
- Switch between front and back cameras
- Use device as a security camera or motion trigger
- Lightweight processing optimized for mobile
Documentation
OpenCV motion detector that draws on a camera preview inside an arrangement. Call Initialize, then StopDetection when you leave the screen.
Docs6
CameraError
EventTriggered when camera error occurs
| Parameter | Type |
|---|---|
| errorMessage | text |
WebViewError
EventTriggered when WebView encounters an error
| Parameter | Type |
|---|---|
| errorCode | number |
| description | text |
| failingUrl | text |
Blocks8
Compatible platforms
MIT App InventorKodularNiotronAndroid BuilderThunkableRelated extensions
FaceDetection
Free
Detect faces in real time with OpenCV and mark them directly in your app.
Groq
$7.99
Groq Compound, GPT-OSS, Qwen 3.6/3.8, Orpheus TTS, and Whisper STT — live models only, with MCP and streaming.
xAI Grok
$7.99
Grok 4.6 chat plus Grok Imagine image generation, with history, system prompts, and temperature control.
GFont
Free
Access 1500+ Google Fonts in your AI2 apps with ease. Download, apply, and customize fonts directly.