Nut/OS is based on an intentionally simple RTOS kernel, which provides a minimum of services to run Nut/Net, the TCP/IP stack. Its features include:

• Coperative multithreading
• Deterministic interrupt response times
• Priority based event handling
• Periodic and one-shot timers
• Dynamic memory management

Main features of the TCP/IP stack are:

• Base protocols Ethernet, ARP, IP, ICMP, UDP, TCP and PPP
• User protocols DHCP, DNS, SNTP, SMTP, FTP, SYSLOG, HTTP and others
• Socket API
• Host, net and default routing