📱 Production Showcase: Speed Assistant App

The Flagship Consumer Telematics Reference Implementation Powered by Veg Sahayyak SDK.

Speed Assistant App

A high-precision mobile speedometer and driving safety HUD application designed for daily commuters, highway drivers, and fleet operators.

Visit App Website ↗

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🌟 Overview & Reference Role

The Speed Assistant App serves as the primary production reference implementation of the Veg Sahayyak SDK (com.vegsahayyak:speed-core and com.vegsahayyak:speed-ui).

Instead of maintaining a separate in-house telematics pipeline, the Speed Assistant consumer app delegates all GPS velocity calculation, signal noise filtering, threshold monitoring, and speedometer gauge rendering directly to the SDK.

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⚡ Technical Benchmarks in Production

Dimension	Engineering Guarantee	SDK Implementation
Memory Footprint	< 5 MB runtime heap	Headless core engine with zero memory leaks and minimal object allocations in the critical location loop.
UI Render Performance	Fluid 60 FPS	Hardware-accelerated Canvas rendering via @Composable SpeedGauge.
GPS Velocity Smoothing	Proprietary Native EMA	Eliminates raw sensor jitter without introducing perceptible lag.
Threshold Stability	Dual Schmitt Hysteresis	Proprietary upper/lower bounds eliminate alarm flutter.
Lifecycle Compliance	Android 10 to 15+ Safe	Native FOREGROUND_SERVICE_LOCATION handling with zero unneeded wake-locks when stationary.

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🛠️ How the Production App Implements the SDK

The reference application integrates the SDK using standard Kotlin Coroutines and Jetpack Compose state collection:

1. Initialization in Application / Activity

// Initialize and configure headless telematics
val speedAssistant = SpeedAssistant.with(context, "YOUR_JWT_LICENSE")
    .setWarningSpeedThreshold(80f)      // Alert threshold in km/h
    .setMinWarningSpeedThreshold(30f)   // Minimum corridor threshold
    .setColorScheme(
        SpeedColorScheme(
            safeColor = 0xFF00E676.toInt(),
            overSpeedColor = 0xFFFF1744.toInt(),
            underSpeedColor = 0xFF00E5FF.toInt()
        )
    )

// Start headless foreground service
speedAssistant.start()

2. Rendering the HUD Gauge in Jetpack Compose

@Composable
fun DriverDashboardScreen() {
    val speedState by SpeedAssistant.observeFlow()
        .collectAsState(initial = SpeedData.SpeedUnavailable)

    val currentSpeedKmh = (speedState as? SpeedData.SpeedChanged)?.let { 
        it.speedMps * 3.6f 
    } ?: 0f

    val isOverLimit = (speedState as? SpeedData.SpeedChanged)?.isOverLimit ?: false

    Column(
        modifier = Modifier
            .fillMaxSize()
            .background(Color.Black),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {
        SpeedGauge(
            speed = currentSpeedKmh,
            warningSpeed = 80f,
            minSpeedLimit = 30f,
            isTrackingActive = true,
            isOverLimit = isOverLimit,
            unitLabel = "km/h",
            themeMode = ThemeMode.OLED_BLACK
        )
    }
}

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🔗 Live Application Links

To see the user interface, design, and feature set in action:

• 🌐 Official Web Landing Page: https://speed-assistant-a00f6.web.app/
• 💻 Open-Source Sample Projects: https://github.com/VegSahayyak/veg-sahayyak-samples
• 📦 SDK Integration Guide: Getting Started with Veg Sahayyak SDK
• 📐 Architecture Deep Dive: Signal Smoothing & Schmitt Trigger Architecture