The following paper is the result of a six-month project at the Belgian company Multronic s.r.l in Carmagnola (TO); it designs, manufactures and supplies diesel engine emission aftertreatment systems. The objective of the thesis activity is to implement a communication network with the main reference to the basic elements of AUTOSAR architecture and features. The idea is to have a code independent of the hardware, easy to reuse and with a good level of abstraction. This paper shows the implementation of a firmware that can meet the need to have a code as modular as possible, satisfying the functional requirements in a single platform.