Shields / Mbed 2 deprecated Seeed_WiFi_Shield

Example program for the SeeedStudio WiFi Shield V2.0, based on UART serial port connectivity (D0/D1 pins). This program connects to WiFi hotspot, obtains an IP using DHCP and downloads http://mbed.org/media/uploads/mbed_official/hello.txt

Dependencies:   WiflyInterface mbed

main.cpp@1:ced62d2a69f9, 2014-04-11 (annotated)

Committer:
screamer
Date:
Fri Apr 11 15:21:58 2014 +0000
Revision:
1:ced62d2a69f9
Parent:
0:f2524261196f
Child:
2:61d5dde0c4b4
Changed the example program to make fetch hello.txt from mbed.org

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:f2524261196f 1 #include "mbed.h"
screamer 0:f2524261196f 2 #include "WiflyInterface.h"
screamer 0:f2524261196f 3
screamer 1:ced62d2a69f9 4 Serial pc(USBTX, USBRX);
screamer 1:ced62d2a69f9 5
screamer 0:f2524261196f 6 /**
screamer 0:f2524261196f 7 * D1 - TX pin (RX on the WiFi side)
screamer 0:f2524261196f 8 * D0 - RX pin (TX on the WiFi side)
screamer 1:ced62d2a69f9 9 * NC - Reset pin; use D5 otherwise the shield might get into reset loop
screamer 0:f2524261196f 10 * LED1 - TCP status pin
screamer 0:f2524261196f 11 * "ssid" - hostspot name
screamer 0:f2524261196f 12 * "password" - hotspot passowrd
screamer 0:f2524261196f 13 * security method - NONE, WEP_128, WPA, WPA2
screamer 0:f2524261196f 14 */
screamer 1:ced62d2a69f9 15 WiflyInterface eth(D1, D0, D5, LED1, "hotspot", "", NONE);
screamer 0:f2524261196f 16
screamer 0:f2524261196f 17 int main()
screamer 0:f2524261196f 18 {
screamer 1:ced62d2a69f9 19 wait(3);
screamer 1:ced62d2a69f9 20
screamer 1:ced62d2a69f9 21 // Initialize the interface.
screamer 1:ced62d2a69f9 22 // If no param is passed to init() then DHCP will be used on connect()
screamer 1:ced62d2a69f9 23 int s = eth.init();
screamer 1:ced62d2a69f9 24 if (s != NULL) {
screamer 1:ced62d2a69f9 25 printf(">>> Could not initialise. Halting!\n");
screamer 0:f2524261196f 26 exit(0);
screamer 0:f2524261196f 27 }
screamer 0:f2524261196f 28
screamer 1:ced62d2a69f9 29 printf(">>> Get IP address...\n");
screamer 0:f2524261196f 30 while (1) {
screamer 1:ced62d2a69f9 31 s = eth.connect(); // Connect to network
screamer 0:f2524261196f 32
screamer 1:ced62d2a69f9 33 if (s == false || s < 0) {
screamer 1:ced62d2a69f9 34 printf(">>> Could not connect to network. Retrying!\n");
screamer 0:f2524261196f 35 wait(3);
screamer 0:f2524261196f 36 } else {
screamer 1:ced62d2a69f9 37 break;
screamer 0:f2524261196f 38 }
screamer 0:f2524261196f 39 }
screamer 1:ced62d2a69f9 40 printf(">>> Got IP address: %s\n", eth.getIPAddress());
screamer 1:ced62d2a69f9 41
screamer 1:ced62d2a69f9 42 // Prepare the http request to mbed.org
screamer 1:ced62d2a69f9 43 char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n";
screamer 1:ced62d2a69f9 44 TCPSocketConnection sock;
screamer 1:ced62d2a69f9 45 sock.connect("mbed.org", 80);
screamer 1:ced62d2a69f9 46 sock.send_all(http_cmd, sizeof(http_cmd)-1);
screamer 1:ced62d2a69f9 47 printf(">>> Sent request to mbed.org\n");
screamer 1:ced62d2a69f9 48
screamer 1:ced62d2a69f9 49 // Read the response
screamer 1:ced62d2a69f9 50 char buffer[300];
screamer 1:ced62d2a69f9 51 int ret;
screamer 1:ced62d2a69f9 52 while (true) {
screamer 1:ced62d2a69f9 53 ret = sock.receive(buffer, sizeof(buffer)-1);
screamer 1:ced62d2a69f9 54 if (ret <= 0)
screamer 1:ced62d2a69f9 55 break;
screamer 1:ced62d2a69f9 56 buffer[ret] = '\0';
screamer 1:ced62d2a69f9 57 printf(">>> Received %d chars from mbed.org:\n%s\n", ret, buffer);
screamer 1:ced62d2a69f9 58 }
screamer 1:ced62d2a69f9 59 sock.close();
screamer 1:ced62d2a69f9 60
screamer 1:ced62d2a69f9 61 // Disconnect from network
screamer 1:ced62d2a69f9 62 eth.disconnect();
screamer 1:ced62d2a69f9 63 return 0;
screamer 0:f2524261196f 64 }