No abstract

The rising costs of agriculture machine operation force manufacturers to look for solutions that simplify the machine operation to its users and increase user comfort. However, this trend requires farm machinery to be equipped with electronic systems. Electronic control units do not receive only the information from its own sensors. Modern electronic systems communicate with each other via the data bus. The most common data bus in modern agricultural technology is the CAN-Bus (Controller Area Network). The most common standard used in modern machinery is SAE J1939 standard, which is commonly used for engine control systems. CAN-Bus in modern agricultural technology provides a considerable simplification of the wiring harness of the tractor. Standardized bus also opens the possibility of implementation of Plug & Play additional devices in agricultural tractor. This article is focused on the application of the encryption algorithm Tiny on the CAN-Bus, which is realistically applied to recognition of implement. This article aims to verify the suitability of encryption of Tiny algorithm for the CAN-Bus of 250 kbit/s. As the experiment demonstrated Tiny algorithm is suitable for data encrypting on the CAN-Bus.

Abstmct -Rednet provides portable computers with an incxpensivc wireless network connection. It is designed to support seamless end-to-end communication using the Asynchronous Transfer Mode (ATM). Rednet uses a Iowpower infrared transceiver operating at 2-5 Mbps over a distance of 4 meters. The link layer protocol supports link sharing and transport of ATM cells over the link. Ceiling mounted base stalions in each room act as gateways between the infrared link and rhe wired network. Rednet is designed to support user mobility, so that users can roam from room to room and access network services in a location independent manner. The paper describes our infrared physical layer and link layer protocols, presents an ovcrview of protocols for dynamic address assignment and conncction management, and summarizes the status of the work.