NeuraTrack | Enterprise Vehicle Telemetry System

SYSTEM ARCHITECTURE

Four layers. One mission-critical stack.

From custom silicon-level hardware to a real-time web dashboard — every layer is purpose-built for sub-second vehicle intelligence.

Layer 01 — Hardware

Custom Edge Hardware Architecture

Ultra-compact Seeed Studio XIAO ESP32-C3 RISC-V microcontroller paired with a SIM A7670C 4G LTE modem and Grove Air 530Z high-precision GPS. The power system uses a 3.7V LiPo with a dual 100kΩ resistor voltage divider for safe analog battery monitoring. External SOS button and audio lines enable emergency triggers and live cabin surveillance.

ESP32-C3 4G LTE GPS LiPo Voltage Divider SOS Button Audio I/O

Power

Smart Power Management

3.7V LiPo with native USB charging via XIAO. Hardware voltage divider steps 4.2V → 2.1V for safe ADC monitoring. Live battery percentage rendered as dynamic SVG in the dashboard header.

3.7V LiPo USB-C Charge ADC Monitor

Layer 02 — Firmware

Sub-Second MQTT Engine

Persistent 2-way TCP socket to HiveMQ broker, bypassing heavy HTTP polling. Smart 2048-byte GPS buffer with non-blocking smartDelay() ensures zero dropped NMEA sentences.

MQTT TCP Socket smartDelay()

Connectivity

WiFi Captive Portal & SMS Fallback

Boot without APN? The device spins up NeuraTrack_Setup WiFi for smartphone configuration. If 4G drops, the SMS engine scans every 15s — text "SEND LOCATION" to receive a live Google Maps link with speed data.

Captive Portal AT Commands SMS

Safety

SOS & Listen-In Surveillance

Hold the physical button 5 seconds → SMS coordinates to 3 contacts + auto voice call. Call the tracker number → silently auto-answers for ambient cabin audio monitoring via ATS0=1 hardware integration.

SOS Voice Call ATS0=1

Layer 03 — Backend

Node.js Real-Time Infrastructure

Token-based REST authentication with WebSocket ingestion engine. Incoming MQTT payloads are routed to all connected web clients in real-time — zero page refreshing. Server-side atomic timestamps (Date.now()) replace unreliable hardware uptime for perfectly synchronized GPS packets.

Node.js WebSocket JWT Auth Atomic Time

OTA

Over-The-Air Configuration

Update SOS contact numbers from the web dashboard and securely dispatch them back to the physical device via MQTT retained messages. Configurations are written to the ESP32's non-volatile flash memory (Preferences.h) — surviving total power loss.

MQTT Retained Preferences.h Flash Memory

Layer 04 — Dashboard

Real-Time Web Intelligence & Control

A premium tracking interface with live Leaflet maps, dynamic Haversine geofencing with draw/resize controls, hardware watchdog timer (15s offline detection), looping Web Speech API alarms on breach, native Service Worker push notifications, real-time SVG battery indicator, collapsible memory-safe history with interactive waypoint playback — click any timestamp to fly the map camera to that coordinate.

Leaflet Maps Haversine Geofence Draw Watchdog Timer

Web Speech API Push Notifications Service Worker

SVG Battery Waypoint Playback History Toggle

"The dashboard actively monitors the 5-second heartbeat. If 15 seconds pass with no data, the UI instantly throws a red OFFLINE indicator."

CAPABILITIES

Engineered for every edge case.

Security, reliability, and intelligence — at every layer of the stack.

Dynamic Smart Geofencing

Haversine spherical distance calculations on the client side. Draw, resize, and save circular perimeters on the live map. Breach triggers looping voice alarms and mobile push notifications.

Hardware Watchdog Timer

Monitors the 5-second telemetry heartbeat. If 15 seconds pass with no incoming data, the dashboard instantly throws a red OFFLINE status — ensuring you always know the device state.

Listen-In Surveillance

Hardware-level auto-answer (ATS0=1). Call the tracker's phone number — the module silently answers after one ring for ambient audio monitoring of the vehicle cabin.

Mobile Push Notifications

Native Service Worker (sw.js) triggers smartphone vibrations and lock-screen push notifications during geofence breaches and security events — even when the browser is in the background.

Multi-Contact SOS Broadcast

Hold the physical button for 5 seconds — instantly broadcasts an emergency Google Maps SMS to up to 3 authorized numbers, followed by an automated voice call to the primary contact.

Waypoint Playback & History

Collapsible, memory-safe sidebar renders only the 10 latest logs while maintaining the full trail on the map. Click any timestamp to fly the camera to that historical coordinate with a glowing pulse marker.

DATA FLOW

From satellite to screen in under one second.

Four stages. Zero polling. Pure real-time architecture.

GPS Lock

Grove Air 530Z module acquires satellite fix. NMEA sentences are parsed via a 2048-byte smart buffer with zero data loss.

4G Transmit

ESP32-C3 firmware publishes GPS payload to HiveMQ broker via persistent MQTT TCP socket over SIM A7670C 4G LTE.

Server Ingest

Node.js backend subscribes to MQTT topic, applies atomic timestamps, and fans out to all WebSocket clients instantly.

Dashboard Render

Browser receives packet via WebSocket. Map updates, geofence calculates Haversine distance, alarms trigger if breached.

Edge Intelligence.
Hardware Precision.
Global Reach.

Ready to deploy mission-critical tracking?

Edge Intelligence. Hardware Precision. Global Reach.

Ready to deploy mission-critical tracking?

Secure Access

Edge Intelligence.
Hardware Precision.
Global Reach.