Difference Between Car API And SomeIP Interface

Prachi Mishra
2 min readOct 6, 2023

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before jumping to the Differences, let's check the CAR API?

CAR API — (Connected, Autonomous, and Remote API): is a set of software interfaces and protocols designed to enable communication and data exchange within connected and autonomous vehicles.

It focuses on providing standardized interfaces for applications and services running within the vehicle, allowing them to interact with various vehicle systems and components such as infotainment systems, sensors, navigation, and more.

CAR API helps facilitate the development of in-car applications and services.

Some/IP Interface: here is the link for more description about some/IP Interface.

Some/IP Interface Overview: this is the communication protocol which is used for real-time communication between ECU’s within a vehicle network.

It’s designed to facilitate efficient and reliable communication over IP networks.

SOME/IP allows for the exchange of data and messages between different ECUs in a standardized and scalable manner.

Why CarApi is not providing real-time Data?

CarApi is used to define the standardized way to communicate between the Application software to the Vehicle and to provide a common framework and set of rules for interaction.

Real-time data Transfer and communication typically require protocols and mechanisms that can handle Data Transmission and receiving within
time constraints.

In the Automotive Domain, most of the Applications require real-time Data capabilities, which can be achieved by communication protocols like Flex Ray, CAN, Ethernet or SOME/IP.

Choosing the Protocols depends on the priorities of Data or app requirements.

Conclusion: CarApi provides a standardized API for software components to communicate, ensuring a common framework for interaction.

On the other hand, SOME/IP is a communication protocol that facilitates real-time communication between various components (like ECUs) over IP networks, ensuring efficient and reliable data exchange.

Thank you for reading this information, it will be beneficial as you begin working with SOME/IP or CARAPI in your projects.

Stay tuned and happy coding!

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Prachi Mishra
Prachi Mishra

Written by Prachi Mishra

I am working As an Android Dev. Currently, developing an App for my Dream car (BMW) .In my Dev path If I find something interesting I like to share it with you.