📦 Black Box (CXBB)

The Black Box module functions like an airplane’s “black box”: it captures and stores reports before and after an event, allowing analysis of what happened in the moments prior to and following an incident.

🤔 What is it used for?

Imagine a critical accident or event occurs. With Black Box you can:

• 🔙 See the past: What happened in the seconds/minutes before the event
• 🔜 See the future: What happened after the event
• 📊 Forensic analysis: Reconstruct exactly what occurred
• 🚗 Driving: Analyze driver behavior during sudden braking

⚙️ How it works

1. Continuous capture: The device continuously records reports in the background
2. Circular buffer: Maintains the last N samples (overwrites the oldest ones)
3. Event/Trigger: When the event occurs, it “freezes” the past and captures the future
4. Transmission: Sends all reports (past + future) to the server

🔧 Configuration

SCXBB Command

>SCXBB,type,frequency,future_samples,past_samples<

Recommended report types

🎯 Activation

GBB Command - Trigger capture

>GBBnnP<

Example:

>GBB01H<    // Triggers Black Box with ID=01, high priority

📋 Practical examples

🚨 Accident analysis (high frequency)

Capture position every second, 10 seconds before and 20 after:

>SCXBB,CQ,1,20,10<

Result: When triggered, you get 30 reports (10 past + 20 future) with 1-second resolution.

🚗 Sudden braking analysis

Capture movement every 500ms, 15 samples before and after:

>SCXBB,MV,0.5,15,15<

Result: 30 reports with half-second resolution to analyze the maneuver.

📍 Route monitoring (low frequency)

Capture position every minute, 5 before and 20 after:

>SCXBB,CQ,60,20,5<

Result: 25 reports covering ~25 minutes of route.

🔗 Integration with Event Engine

You can activate Black Box automatically upon specific events:

// Activate Black Box on sudden braking
>SRL50E;TRG=ACC-;ACC={GBB01H}<
 
// Activate on speeding
>SRL51E;TRG=SPD+;ACC={GBB02H}<
 
// Activate on battery disconnection
>SRL52E;TRG=PWR-;ACC={GBB03H}<

📊 Query

QCXBB Command

>QCXBB<

Response:

>RCXBB,CQ,1,20,10;ID=...

📖 Command summary

✅ Compatibility

🔗 See also

• Generator G - Manual report generation
• Event Engine - Automate activation
• Standard Reports - Available report types