avr上的RTOS，支持以态网，是德国一家公司开发的开源软件，据说比uCos还要好，这是源码-avr the RTOS support to state network, a German company developing open-source software, It is said to be better than uCos, this is FOSS

基于ETHERNUT 开源项目的串口设备以太网接入方案，包括全套资料-ETHERNUT open-source projects based on the serial device Ethernet access options, including a full set of data