Bongjun Hur / Mbed OS mbed-os-example-sockets

Simple mbed OS sockets example for mbed OS5 & W5500 SPI Ethernet controller. This is a quick example of a simple HTTP client program using the network-socket API that is provided as a part of mbed-os. The program brings up an underlying network interface, and uses it to perform an HTTP transaction over a TCPSocket.

Dependencies:   W5500Interface easy-connect

Fork of mbed-os-example-mbed5-sockets by mbed-os-examples

Result

  • Serial Terminal Log

/media/uploads/Bongjun/img021.png

main.cpp@5:3e952c60d705, 2016-12-15 (annotated)

Committer:
mbed_official
Date:
Thu Dec 15 16:15:05 2016 +0000
Revision:
5:3e952c60d705
Parent:
0:17bd84fc5087
Child:
12:2e7466eba9a3
Updated mbed-os 7b974ca -> 532da71



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Commit copied from https://github.com/ARMmbed/mbed-os-example-sockets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:17bd84fc5087 1 #include "mbed.h"
mbed_official 5:3e952c60d705 2 #include "EthernetInterface.h"
mbed_official 0:17bd84fc5087 3
mbed_official 5:3e952c60d705 4 // Network interface
mbed_official 5:3e952c60d705 5 EthernetInterface net;
mbed_official 0:17bd84fc5087 6
mbed_official 0:17bd84fc5087 7 // Socket demo
mbed_official 5:3e952c60d705 8 int main() {
mbed_official 5:3e952c60d705 9 // Bring up the ethernet interface
mbed_official 5:3e952c60d705 10 printf("Ethernet socket example\n");
mbed_official 5:3e952c60d705 11 net.connect();
mbed_official 0:17bd84fc5087 12
mbed_official 0:17bd84fc5087 13 // Show the network address
mbed_official 5:3e952c60d705 14 const char *ip = net.get_ip_address();
mbed_official 0:17bd84fc5087 15 printf("IP address is: %s\n", ip ? ip : "No IP");
mbed_official 0:17bd84fc5087 16
mbed_official 0:17bd84fc5087 17 // Open a socket on the network interface, and create a TCP connection to mbed.org
mbed_official 5:3e952c60d705 18 TCPSocket socket;
mbed_official 5:3e952c60d705 19 socket.open(&net);
mbed_official 0:17bd84fc5087 20 socket.connect("developer.mbed.org", 80);
mbed_official 0:17bd84fc5087 21
mbed_official 0:17bd84fc5087 22 // Send a simple http request
mbed_official 0:17bd84fc5087 23 char sbuffer[] = "GET / HTTP/1.1\r\nHost: developer.mbed.org\r\n\r\n";
mbed_official 0:17bd84fc5087 24 int scount = socket.send(sbuffer, sizeof sbuffer);
mbed_official 5:3e952c60d705 25 printf("sent %d [%.*s]\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
mbed_official 0:17bd84fc5087 26
mbed_official 0:17bd84fc5087 27 // Recieve a simple http response and print out the response line
mbed_official 0:17bd84fc5087 28 char rbuffer[64];
mbed_official 0:17bd84fc5087 29 int rcount = socket.recv(rbuffer, sizeof rbuffer);
mbed_official 5:3e952c60d705 30 printf("recv %d [%.*s]\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
mbed_official 0:17bd84fc5087 31
mbed_official 0:17bd84fc5087 32 // Close the socket to return its memory and bring down the network interface
mbed_official 0:17bd84fc5087 33 socket.close();
mbed_official 0:17bd84fc5087 34
mbed_official 5:3e952c60d705 35 // Bring down the ethernet interface
mbed_official 5:3e952c60d705 36 net.disconnect();
mbed_official 0:17bd84fc5087 37 printf("Done\n");
mbed_official 0:17bd84fc5087 38 }