--- title: "MQTT Broker for Automotive & Connected Vehicles | ConnectMQ" description: "Managed MQTT for automotive: body shop, paint and assembly data, connected car telematics, EV charging and fleets on a private broker with TLS and topic ACLs." url: "https://connectmq.com/industries/automotive/" language: "en" --- ![](https://connectmq.com/images/industries/hero/automotive.webp) # From the body shop to the open road Weld robots, paint booths and end-of-line testers publish in the plant; telematics units, EV chargers and fleet trackers publish from the road. ConnectMQ is the managed MQTT broker between them and your MES, vehicle backend and analytics. [Try it free](https://app.connectmq.com/signup) [Use cases](#use-cases) No card required The challenge ## Plant and vehicle data, two worlds 1. 01 ### Takt time leaves no slack One stopped weld robot or conveyor on a JIT/JIS line stalls the whole sequence. Alarms buried in a PLC or a local HMI reach maintenance minutes later than they should. 2. 02 ### Vehicles on patchy links Telematics units drop out in tunnels, car parks and rural areas. Polling HTTP APIs burns data plans and loses events, and a command sent while the vehicle is offline simply vanishes. 3. 03 ### Every supplier, its own stack Test benches, tier-1 equipment, telematics boxes and chargers each come with their own protocol, portal and cloud. Getting them into one backend is a new integration project every time. Why ConnectMQ ## Why automotive teams choose ConnectMQ One standard protocol for the plant floor and the vehicle edge, on a broker you don’t have to operate. - ### Private broker, standard MQTT An isolated broker instance speaking MQTT 3.1.1 and 5 over TCP, TLS and WebSocket. The same client libraries work for PLC gateways, TCU firmware, backend services and web apps. - ### An identity for every device Each gateway, vehicle and charger gets its own credentials, and per-topic ACLs keep a vehicle on its own topics. All traffic is encrypted with TLS. - ### Built for links that drop Persistent sessions and QoS 1 hold commands until a vehicle reconnects, Last Will marks a unit offline the moment it disappears, and retained state brings a new app up to date at once. - ### Alerts on the right signal Threshold rules on robot weld current, booth temperature, battery state of charge or charger faults trigger alerts and notifications, and the live topic monitor shows what every device sends. Key use cases ## Key use cases in Automotive Automotive teams run MQTT in two places — on the plant floor and on the road. These are the use cases they start with. [ ### Connected Vehicles Vehicle telematics, remote commands and OTA campaign messaging over one MQTT connection Explore the use case](https://connectmq.com/use-cases/connected-vehicles/)[ ### Predictive Maintenance Stream vibration, temperature and motor current to your models and open work orders before a machine fails Explore the use case](https://connectmq.com/use-cases/predictive-maintenance/)[ ### EV Charging Management Site telemetry, load management and live charger status for apps, alongside OCPP Explore the use case](https://connectmq.com/use-cases/ev-charging-management/)[ ### Fleet Management Live location, vehicle and driver data for dispatch, your TMS and customer ETAs Explore the use case](https://connectmq.com/use-cases/fleet-management/) Architecture ## From plant and road to your systems - Weld robots & PLCs - Paint booths & EOL testers - Telematics units (TCU) - EV chargers & fleet trackers **ConnectMQ**MQTT 3.1.1 · 5 · TLS - MES & quality systems - Connected vehicle backend - Charge point management - Fleet apps & analytics Example topic namespace ``` plant/dallas/body-shop/cell-12/robot-03/telemetry plant/dallas/body-shop/cell-12/robot-03/state (retained) vehicles/vh-4821/telemetry vehicles/vh-4821/commands vehicles/vh-4821/status (retained) ``` Related solutions ## Solutions for Automotive [ ### Industrial IoT & Smart Manufacturing Machines, PLC gateways, OEE and quality data Learn more](https://connectmq.com/industrial-iot/)[ ### Fleet Telematics Vehicle tracking, telematics and cold chain Learn more](https://connectmq.com/fleet-logistics/)[ ### Smart Energy Meters, EV chargers, solar and batteries Learn more](https://connectmq.com/energy-utilities/) ## Automotive: frequently asked questions How do connected cars use MQTT? A telematics control unit (TCU) keeps one lightweight MQTT connection over cellular, publishes position, diagnostics and battery data to its own vehicle topics and subscribes to a commands topic. Persistent sessions and QoS 1 make sure a command — a configuration change, a remote action from the app — reaches the car once it is back online. MQTT vs HTTP for vehicle telematics? HTTP opens a new request for every reading and can’t push a command to a car. MQTT keeps one connection open, adds only a few bytes of header, delivers commands as soon as the vehicle is online and tells you when it drops off (Last Will). On intermittent cellular links it is the more efficient fit. Can one MQTT broker handle both plant and vehicle data? Yes, if you separate them by topic and permissions: a plant/… tree for the factory, a vehicles/… tree for the fleet, and separate credentials and ACLs for every gateway, vehicle and application. Choose the plan for your number of connections and message rate — many teams simply run plant and vehicles on two ConnectMQ instances. Does ConnectMQ support OCPP for EV chargers? ConnectMQ is an MQTT broker, not an OCPP central system. Chargers usually speak OCPP to your charge point management system (CPMS); the CPMS, site controllers and energy managers then publish sessions, meter values and faults over MQTT, and some chargers publish MQTT directly. ConnectMQ carries that data to monitoring, billing and load management. ## Start your automotive pilot on ConnectMQ Start on the Free plan — no card required. Connect a test cell or a handful of vehicles today, then move to Basic or Scale when you go live. No overage charges, cancel anytime. [Get started](https://app.connectmq.com/signup) [See pricing](https://connectmq.com/pricing/) ## Other industries - [Manufacturing](https://connectmq.com/industries/manufacturing/) - [Oil & Gas](https://connectmq.com/industries/oil-gas/) - [Utilities](https://connectmq.com/industries/utilities/) - [Renewable Energy](https://connectmq.com/industries/renewable-energy/) - [Chemicals](https://connectmq.com/industries/chemicals/) - [Pharma & Life Sciences](https://connectmq.com/industries/pharma-life-sciences/) - [Food & Beverage](https://connectmq.com/industries/food-beverage/) - [Healthcare](https://connectmq.com/industries/healthcare/) - [Transportation & Logistics](https://connectmq.com/industries/transportation-logistics/) - [Retail & E-commerce](https://connectmq.com/industries/retail-ecommerce/) - [Telecom](https://connectmq.com/industries/telecom/) - [Financial Services](https://connectmq.com/industries/financial-services/) - [Agriculture](https://connectmq.com/industries/agriculture/) ## Articles [All articles](https://connectmq.com/blog/) Managed MQTT Cloud ### [How to Choose an IoT MQTT Broker: 12 Criteria and the Questions to Ask Your Vendor](https://connectmq.com/blog/how-to-choose-an-iot-mqtt-broker/) A practical 12-point checklist for choosing an IoT MQTT broker, a table of questions to ask every vendor, and a five-minute hands-on test you can run against broker.connectmq.com. September 21, 20269 min read Managed MQTT Cloud ### [What Is a Managed MQTT Broker? Benefits, Costs and How to Choose](https://connectmq.com/blog/managed-mqtt-broker/) A managed MQTT broker lets you run IoT messaging without operating servers, certificates or patches yourself. Compare managed and self-hosted, pick a deployment model and connect your first client in five minutes. September 1, 202610 min read Industrial IoT ### [Sparkplug B and the Unified Namespace: Structuring Industrial IoT Data on MQTT](https://connectmq.com/blog/mqtt-sparkplug-b-unified-namespace/) Sparkplug B gives industrial MQTT a strict session and payload model, while a Unified Namespace gives your plant data a single, readable home. Here is how they fit together, with topic design tips and live examples. August 26, 20269 min read