Decouple vehicle services
Separate message producers from consumers so teams can develop and update vehicle services with fewer direct dependencies.
SOFTWARE-DEFINED VEHICLES
MQTT backbone for software-defined vehicles
Unify in-vehicle and V2X communication with EMQX. Power diagnostics, connected services, and AI agents with shared vehicle data.
- Largest auto companies
- 5/10
- EV startups
- 7/10
- Auto companies
- 50+
- Car models
- 100+
- Vehicles connected
- 25M+
- Messages daily
- 1B+
Trusted by automotive leaders worldwide
Overview
Why MQTT for software-defined vehicles?
Publish data once and make it available to authorized services, cloud applications, and AI systems through shared messaging interfaces.
Extend vehicle applications
Connect vehicle services through shared messaging interfaces so new applications can use the data they need.
Connect vehicle data to AI agents
Give AI applications access to relevant vehicle events for copilots, maintenance analysis, and personalized experiences.
Architecture
One MQTT backbone from vehicle to cloud
Collect vehicle data with EMQX Velo and bridge it to EMQX Enterprise over MQTT. Route selected data to cloud applications and AI agents.
CAN
DDS
SOME/IP
File
Video
EMQX Velo
Data processing
Message bus
Raw data storage
Control plane
EMQX Enterprise
MQTT messaging
Rule engine
Data integration
Vehicle applications
Fleet management
OTA updates
Remote diagnostics
AI agents
Powered by
OpenAI
Gemini
Anthropic
Data & analytics
Apache Kafka
Data lake
BI Dashboard
In-vehicle messaging
Use EMQX Velo to connect vehicle services and data sources. EMQX Velo provides the local MQTT messaging layer.
EMQX Velo Coming soon
Vehicle-to-cloud messaging
Bridge selected telemetry to the cloud and route authorized commands back to the vehicle over MQTT.
MQTT bridge guideCloud applications
Deliver vehicle data to diagnostics, fleet management, update coordination, and analytics applications through supported integrations.
Data integration guideCapabilities
Why EMQX for software-defined vehicles
Connect existing vehicle protocols, process data locally, and exchange selected messages with cloud services through a consistent MQTT foundation.
In-vehicle data bus
Use EMQX Velo as a local MQTT broker so vehicle services can publish and subscribe through a shared messaging bus.
EMQX Velo guide Coming soon
Protocol bridging
Connect CAN, SOME/IP, and DDS systems to MQTT through protocol adapters that fit your vehicle architecture.
Explore supported protocolsVehicle data persistence
Store selected vehicle data locally, query it by time range, and plan cloud uploads around connectivity and retention needs.
MQTT Stream guideLocal stream processing
Filter and prepare vehicle data close to its source to support local analytics and reduce unnecessary cloud transfers.
Vehicle data processingVehicle-to-cloud connectivity
Bridge telemetry, commands, and events between EMQX Velo and cloud MQTT brokers for connected vehicle services.
MQTT bridge guideConsistent messaging interfaces
Use shared MQTT topics and message contracts so vehicle and cloud applications can exchange data through consistent interfaces.
MQTT concepts guideProtocol adapters
Bridge vehicle protocols with MQTT
Connect existing CAN, SOME/IP, and DDS-RTPS systems through protocol adapters. Explore MQTT, WebRTC, and ZeroMQ integration paths for your vehicle architecture.
USE CASES
Put vehicle data to work
Share vehicle data with applications for remote diagnostics, software update coordination, and personalized driver services.
Remote control and diagnostics
Send authorized commands and collect diagnostic data to investigate issues and support vehicles remotely.
OTA update coordination
Send update notifications and progress events over MQTT while your software delivery service manages packages and installation.
In-vehicle applications
Give authorized vehicle applications access to events and services through shared messaging interfaces.
Connected road information
Route vehicle and infrastructure events to applications that provide traffic updates and road hazard information.
AI copilots and personalization
Bring vehicle events to voice assistants, maintenance analysis, and personalization services, with access controlled by the application.
Vehicle data services
Share selected vehicle data with fleet, traffic analysis, and usage-based insurance applications.
Customer story
SAIC Volkswagen
- Vehicles by 2026
- 2M+
- Messages/Sec
- 100k
EMQX supports SAIC Volkswagen’s next-generation vehicle connectivity platform, connecting vehicle operating systems with cloud applications at scale.
Read the full story
Geely Automobile Group
- Connected EVs
- 1M+
- Msgs/Sec Peak
- 100k+
Geely uses EMQX for its Telematics Service Provider (TSP) platform, bringing vehicle monitoring and remote control to its connected electric vehicles.
Read the full story
UISEE Technology
- Availability
- 99.995%
- Dev Efficiency
- +5%
UISEE connects autonomous vehicles and AGVs to cloud services with EMQX, supporting vehicle data collection and autonomous driving development.
Read the full story
Resources
Explore EMQX for software-defined vehicles
FAQ
Frequently asked questions
A software-defined vehicle (SDV) uses software to shape and extend vehicle functions. Shared data interfaces connect services, while supported over-the-air updates add or improve features over time.
MQTT uses publish/subscribe messaging to share telemetry, events, and commands. It separates message producers from consumers and can connect in-vehicle services with cloud applications.
EMQX routes telemetry and commands between vehicles, cloud platforms, and backend services. Protocol adapters connect in-vehicle networks, while application integrations deliver data to diagnostics, fleet management, and other services.
MQTT carries update notifications, commands, and progress events. Your OTA service handles software package delivery, signature verification, installation, and recovery.
Use an in-vehicle MQTT broker such as EMQX Velo to exchange local messages. Configure an MQTT bridge to EMQX Enterprise so selected telemetry flows to cloud applications and authorized commands return to the vehicle.
Yes. EMQX Velo can persist selected MQTT messages locally with MQTT Stream. Applications can query historical data by time range and replay it for analysis or cloud synchronization.
Build the data foundation for your next SDV
Discuss in-vehicle messaging, protocol adapters, and cloud integration with our automotive team.