This paper reports on the development of an embedded networking protocol stack, which is for pervasive embedded devices. Taking into account requirements for sensors and low-price consumer devices. Instead of applying TCP/IP (designed to support routing and end-to-end connectivity) to embedded networking, our boundary conditions are quite different. The protocols presented here specifically provide embedded networking within local subnets. No routing is performed; instead a gateway can make the embedded devices visible to the global Internet. This configuration provides better scalability, RAM/ROM utilization, and lower power consumption. The developed single subnet architecture and additional protocols supporting pervasive applications are presented and shortly analyzed.