Home/Portfolio/Evtor - EV Charging Network & Telemetry OS

Mobile EngineeringProduction AuditedClient: Evtor Mobility Network Pvt LtdIndustry: Electric Mobility, Cleantech & Smart Infrastructure

Timeline: 7 Weeks (4 Sprints)

$48,000 Scope

Evtor - EV Charging Network & Telemetry OSOCPP 2.0.1 Charging Station Aggregator, Real-Time Hardware Telemetry & Driver Wallet App

How Divanex built Evtor's OCPP 2.0.1 aligned EV charging network platform, driver mobile application, and real-time station telemetry dashboard.

Session Start Latency

2.4s

Instant QR scan-to-charge

Station Status Accuracy

99.9%

Sub-second telemetry sync

Active Fast Chargers

Multi-Station

Commercial multi-brand deployment

Driver Mobile Rating

4.9 ★

Smooth map HUD & wallet checkout

Divanex Engineering Pod:1 IoT & Embedded Protocol Architect2 Backend Systems Engineers1 React Native Mobile Developer1 Hardware Integration QA Specialist

Standards:✓ OCPP 2.0.1 Protocol Aligned✓ ISO 15118 Ready✓ AES-256 Encrypted Telemetry Channels

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OCPP 2.0.1 Charging Station HUD

2.4s Session Start

Station: EVTOR-FAST-042 (CCS2 120kW)● Charging

Power

92.4 kW

Battery

68%

Time Left

14 mins

Station Status Accuracy:99.9% Telemetry SLA

HARDWARE TELEMETRY & DRIVER APP

Connected EV Charging Network & OCPP 2.0.1 Telemetry Engine

Standardized heterogeneous multi-brand EVSE hardware through a universal OCPP 2.0.1 WebSocket broker, enabling instant QR scan-to-charge in 2.4 seconds with real-time electrical telemetry.

✓ 11.6x Faster Session Start✓ 4.9★ Driver App Rating✓ TimescaleDB Time-Series

THE CLIENT PROBLEM

Unreliable Station Connectivity, Broken QR Starts & Frustrated EV Drivers

EV drivers frequently faced offline chargers, delayed mobile app sync, and failed payment authorizations at charging points, leading to high support tickets and stranded motorists.

Core Friction Points:

✕Legacy chargers took up to 28 seconds to acknowledge a mobile app remote start command.

✕Apps showed chargers as 'Available' when they were actually occupied or under fault (76% status accuracy).

✕Multiple charging hardware brands used proprietary, incompatible communication protocols.

WHAT WE BUILT & DELIVERED

Unified OCPP 1.6J/2.0.1 Telemetry Gateway & Ultra-Fast Driver Mobile App

Divanex engineered a universal OCPP broker service communicating with multi-brand EVSE hardware over WebSockets, coupled with a high-performance React Native driver application.

Delivered Architecture Pillars:

Universal OCPP 2.0.1 WebSocket BrokerNode.js • MQTT • TimescaleDB

Standardized protocol translation layer ingesting meter values, status notifications, and start/stop transactions with sub-95ms latency.

Sub-Second QR Scan-to-Charge FlowReact Native • WebSockets • Redis

Drivers scan the charger QR code, authorize via prepaid in-app wallet, and power starts flowing within 2.5 seconds.

Dynamic Grid & Tariff CalculationPostgreSQL • Python Analytics

Automated peak/off-peak pricing, green energy credits, and fleet billing with automated monthly statements.

SYSTEM TOPOLOGY, CODE & SECURITY

Architecture Blueprint & Technology Taxonomy

1. Station Telemetry Ingestion

OCPP Central System

Hardware pushes live voltage, amperage, and connector status over secure WSS.

2. Map HUD Discovery

Driver Mobile App

Driver discovers nearest vacant charger with live plug compatibility (CCS2, Type 2, GB/T).

3. Instant Session Start

RemoteStartTransaction

Driver scans QR code; broker issues RemoteStartTransaction payload in <120ms.

4. Live Charging HUD

TimescaleDB & WebSocket

App streams live battery %, charging speed (kW), elapsed time, and accruing bill in real-time.

Engineering Guardrails & Standards:

Universal hardware support: Compatible with ABB, Delta, Schneider, and custom Indian EVSE units.

Smart Route Planner: Automatically calculates highway charging stops based on car battery state.

B2B Host Dashboard: Enables property owners to set custom tariffs and view daily electricity revenue.

TIMELINE & SPRINT CADENCE

Milestone Execution & Sprint Breakdown

Week 1–2

Sprint 1: Protocol Architecture & OCPP Broker

Custom OCPP 1.6J/2.0.1 implementation and mock charger testing harness.

Week 3–4

Sprint 2: Driver App & Mapbox Integration

Mobile app with charger search, plug filters, and route navigation.

Week 5–6

Sprint 3: Wallet Payments & Telemetry HUD

Prepaid wallet, instant QR authorization, and live charging dashboard.

Week 7

Sprint 4: Field Testing & Public Release

Physical validation on commercial fast chargers and public app launch.

KEY ARCHITECTURAL WINS

Enterprise Outcomes & Engineering Learnings

✓

Sub-2.5 second QR scan-to-charge eliminated driver friction at charging points.

✓

Time-series database effortlessly logs real-time voltage, amperage, and kWh readings.

✓

Scalable architecture ready for growing charging networks.

EXECUTIVE VERIFICATION

“The Evtor platform built by Divanex is solid as a rock. Our hardware partners connected their chargers seamlessly, and drivers constantly praise the instant QR charging experience.”

Ananya Sharma

Chief Technology Officer • Evtor Mobility Solutions

PORTFOLIO SHOWCASE