Ethernet over EtherCAT (EoE) is a protocol that allows the encapsulation of Ethernet frames within EtherCAT frames. This is done by encapsulating the Ethernet frame in the EtherCAT mailbox. The EoE protocol is used to tunnel standard Ethernet traffic through an EtherCAT segment. The EtherCAT-IOLink Gateway example implements a basic HTTP webserver, using EoE to pass Ethernet frames to the LWIP stack and processing them in a user application.

For more general information about EoE, refer to the respective sections in the EtherCAT SubDevice Example documentation.

Webserver application

For more information about the webserver application, please refer to the respective example page in the EtherCAT SubDevice Example documentation.

Standardized Master Interface (SMI)

EoE is utilized to encapsulate the SMI (Standardized Master Interface) communication within TCP/IP packets. The protocol is compatbile with IOL GUI and Conformance Test tools. It is reachable on TCP/IP Port 5632. By default TCP protocol is used. By removing the define USE_TCP_SERVER it is also possible to use UDP.