Simplifying Authenticated Cloud Connectivity for Any Device.
How Wi-Fi and Cellular connectivity modules with ExpressLink can help create secure cloud connected devices. See the blog post.
Designing an energy efficient and cloud-connected IoT solution with CoAP.
A client/server, request/response, UDP-based protocol for efficiency and cloud compatibility. See the blog post.
Introducing FreeRTOS Kernel version 11.0.0:
A Major Release with Symmetric Multiprocessing (SMP) Support. See the blog post.
FreeRTOS Roadmap and Code Contribution process.
The FreeRTOS roadmap and code contribution process are now published here and on GitHub. See the blog post.
OPC-UA over TSN with FreeRTOS.
A development project to give applications consistent access to hardware TSN capabilities. See the blog post.
Network Sockets
A socket
is conceptually an end point for communication, and the
Berkeley sockets
API is the defacto cross platform standard API used to create, configure,
read from, write to, and otherwise manage sockets.
A socket is identified using the IP address
of the network node, and the port number
within the network node.
If a network node wants to send UDP data
onto the network it first creates
a socket, then sends the data to that socket. If a network node wants to
receive UDP data it first creates a socket on an address that is known
by the node that will send the data, then reads the data from that socket.
If a network node wants to send TCP data
onto the network it first
creates a socket, connects that socket to a socket on a remote node,
then sends the data to that socket. If a network node wants to receive
TCP data it first creates a socket, then listens on that socket for
incoming connections. When a connection is received it may (optionally)
create a new socket to handle the connection and then receive the data
on the new socket - leaving the original socket listening for additional
incoming connections.
It can be seen then that any one network node can be involved in multiple
network conversations simultaneously - with a socket being used at each
end of each unique conversation.
Sockets can also be used to send and receive broadcast and multicast
communications - which are both a form of one to many communications.