🚗 Automotive · C4 Architecture · Pro
Connected Car Platform Architecture
A connected vehicle platform: the telematics unit in the car, the cloud services that collect data and send commands, and the owner's mobile app.
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Drawing diagram…
What this diagram shows
- Vehicle telematics unit connects over MQTT with its own certificate
- Remote commands (lock, climate) go through a command service
- Over-the-air updates are delivered from a separate OTA service
Prompt used
A connected car platform: each vehicle has a telematics control unit (TCU) that sends location and health data over MQTT to an IoT gateway. Cloud services include a vehicle data service storing telemetry in a time-series DB, a remote command service for lock/unlock and climate, and an OTA update service. Owners use a mobile app through an API gateway; roadside assistance is an external system.
Mermaid code
C4Container
title Connected Car Platform
Person(owner, "Car Owner", "Uses the mobile app")
System_Ext(car, "Vehicle TCU", "Telematics unit in the car")
System_Boundary(cc, "Connected Car Cloud") {
Container(app, "Owner App", "iOS / Android", "Lock, locate, climate")
Container(api, "API Gateway", "Kong", "Auth and routing")
Container(iot, "IoT Gateway", "MQTT", "Vehicle connections")
Container(data, "Vehicle Data Service", "Go", "Location and health")
Container(cmd, "Remote Command Service", "Java", "Lock, climate, horn")
Container(ota, "OTA Update Service", "Java", "Software campaigns")
ContainerDb(tsdb, "Telemetry DB", "TimescaleDB", "Vehicle signals")
}
System_Ext(rsa, "Roadside Assistance", "Breakdown support")
Rel(owner, app, "Uses")
Rel(app, api, "Calls", "HTTPS")
Rel(api, cmd, "Routes")
Rel(api, data, "Routes")
Rel(car, iot, "Telemetry", "MQTT/TLS")
Rel(iot, data, "Forwards")
Rel(data, tsdb, "Stores")
Rel(cmd, iot, "Sends commands")
Rel(ota, iot, "Pushes updates")
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