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@0:17bd84fc5087, 2016-10-26 (annotated)

Committer:
mbed_official
Date:
Wed Oct 26 12:00:09 2016 +0100
Revision:
0:17bd84fc5087
Child:
5:3e952c60d705
Initial commit

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 0:17bd84fc5087 2 #include "TCPSocket.h"
mbed_official 0:17bd84fc5087 3
mbed_official 0:17bd84fc5087 4 #define STR(x) STR2(x)
mbed_official 0:17bd84fc5087 5 #define STR2(x) #x
mbed_official 0:17bd84fc5087 6
mbed_official 0:17bd84fc5087 7
mbed_official 0:17bd84fc5087 8 // Socket demo
mbed_official 0:17bd84fc5087 9 void http_demo(NetworkInterface *net) {
mbed_official 0:17bd84fc5087 10 TCPSocket socket;
mbed_official 0:17bd84fc5087 11
mbed_official 0:17bd84fc5087 12 // Show the network address
mbed_official 0:17bd84fc5087 13 const char *ip = net->get_ip_address();
mbed_official 0:17bd84fc5087 14 printf("IP address is: %s\n", ip ? ip : "No IP");
mbed_official 0:17bd84fc5087 15
mbed_official 0:17bd84fc5087 16 // Open a socket on the network interface, and create a TCP connection to mbed.org
mbed_official 0:17bd84fc5087 17 socket.open(net);
mbed_official 0:17bd84fc5087 18 socket.connect("developer.mbed.org", 80);
mbed_official 0:17bd84fc5087 19
mbed_official 0:17bd84fc5087 20 // Send a simple http request
mbed_official 0:17bd84fc5087 21 char sbuffer[] = "GET / HTTP/1.1\r\nHost: developer.mbed.org\r\n\r\n";
mbed_official 0:17bd84fc5087 22 int scount = socket.send(sbuffer, sizeof sbuffer);
mbed_official 0:17bd84fc5087 23 printf("sent %d [%.*s]\r\n", scount, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
mbed_official 0:17bd84fc5087 24
mbed_official 0:17bd84fc5087 25 // Recieve a simple http response and print out the response line
mbed_official 0:17bd84fc5087 26 char rbuffer[64];
mbed_official 0:17bd84fc5087 27 int rcount = socket.recv(rbuffer, sizeof rbuffer);
mbed_official 0:17bd84fc5087 28 printf("recv %d [%.*s]\r\n", rcount, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
mbed_official 0:17bd84fc5087 29
mbed_official 0:17bd84fc5087 30 // Close the socket to return its memory and bring down the network interface
mbed_official 0:17bd84fc5087 31 socket.close();
mbed_official 0:17bd84fc5087 32 }
mbed_official 0:17bd84fc5087 33
mbed_official 0:17bd84fc5087 34
mbed_official 0:17bd84fc5087 35 // Example with the ESP8266 interface
mbed_official 0:17bd84fc5087 36 #if defined(MBED_DEMO_WIFI)
mbed_official 0:17bd84fc5087 37 #include "ESP8266Interface.h"
mbed_official 0:17bd84fc5087 38
mbed_official 0:17bd84fc5087 39 ESP8266Interface wifi(D1, D0);
mbed_official 0:17bd84fc5087 40
mbed_official 0:17bd84fc5087 41 int main() {
mbed_official 0:17bd84fc5087 42 // Brings up the esp8266
mbed_official 0:17bd84fc5087 43 printf("ESP8266 socket example\n");
mbed_official 0:17bd84fc5087 44 wifi.connect(STR(MBED_DEMO_WIFI_SSID), STR(MBED_DEMO_WIFI_PASS));
mbed_official 0:17bd84fc5087 45
mbed_official 0:17bd84fc5087 46 // Invoke the demo
mbed_official 0:17bd84fc5087 47 http_demo(&wifi);
mbed_official 0:17bd84fc5087 48
mbed_official 0:17bd84fc5087 49 // Brings down the esp8266
mbed_official 0:17bd84fc5087 50 wifi.disconnect();
mbed_official 0:17bd84fc5087 51
mbed_official 0:17bd84fc5087 52 printf("Done\n");
mbed_official 0:17bd84fc5087 53 }
mbed_official 0:17bd84fc5087 54
mbed_official 0:17bd84fc5087 55 // Example using the builtin ethernet interface
mbed_official 0:17bd84fc5087 56 #else
mbed_official 0:17bd84fc5087 57 #include "EthernetInterface.h"
mbed_official 0:17bd84fc5087 58
mbed_official 0:17bd84fc5087 59 EthernetInterface eth;
mbed_official 0:17bd84fc5087 60
mbed_official 0:17bd84fc5087 61 int main() {
mbed_official 0:17bd84fc5087 62 // Brings up the ethernet interface
mbed_official 0:17bd84fc5087 63 printf("Ethernet socket example\n");
mbed_official 0:17bd84fc5087 64 eth.connect();
mbed_official 0:17bd84fc5087 65
mbed_official 0:17bd84fc5087 66 // Invoke the demo
mbed_official 0:17bd84fc5087 67 http_demo(&eth);
mbed_official 0:17bd84fc5087 68
mbed_official 0:17bd84fc5087 69 // Brings down the ethernet interface
mbed_official 0:17bd84fc5087 70 eth.disconnect();
mbed_official 0:17bd84fc5087 71
mbed_official 0:17bd84fc5087 72 printf("Done\n");
mbed_official 0:17bd84fc5087 73 }
mbed_official 0:17bd84fc5087 74 #endif