This thesis investigated the development of a real-time wireless data transmissionsystem for electrically power-assisted cycles using vehicle-to-everything communication in combination with controller area network bus integration. The mainobjective was to design a prototype capable of transmitting structured and authenticated data, such as unique identifiers, from an external control unit to acycle without affecting its normal operation.

A prototype was implemented using two microcontrollers, a Raspberry Pi Pico andan ESP32, a controller area network transceiver module, and a wireless router.The system was designed to operate over a Wi-Fi network and enable one-way,low-latency data transmission from the control unit to the cycle. The softwareand hardware were developed to ensure compatibility, real-time performance, andfault tolerance.

Initial testing confirmed that the system established a stable wireless connection,transmitted structured data packets, and logged timestamped messages for latency analysis. The measured latency met the requirements for non-critical realtime applications. Additional testing was planned to evaluate performance acrosslonger distances and in more complex environments.

This work demonstrated the technical feasibility of a lightweight and secure wireless communication system for electrically assisted bicycles. The results provideda foundation for future developments such as smart infrastructure interaction,remote diagnostics, and management of bicycle fleets.