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@7:5aef8fc8996d, 2014-07-25 (annotated)

Committer:
screamer
Date:
Fri Jul 25 12:26:16 2014 +0000
Revision:
7:5aef8fc8996d
Parent:
6:f80c278ca79c
Child:
8:f8bb043cf183
Add Apache2 license compatible header

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 7:5aef8fc8996d 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
screamer 7:5aef8fc8996d 2 *
screamer 7:5aef8fc8996d 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
screamer 7:5aef8fc8996d 4 * and associated documentation files (the "Software"), to deal in the Software without
screamer 7:5aef8fc8996d 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
screamer 7:5aef8fc8996d 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
screamer 7:5aef8fc8996d 7 * Software is furnished to do so, subject to the following conditions:
screamer 7:5aef8fc8996d 8 *
screamer 7:5aef8fc8996d 9 * The above copyright notice and this permission notice shall be included in all copies or
screamer 7:5aef8fc8996d 10 * substantial portions of the Software.
screamer 7:5aef8fc8996d 11 *
screamer 7:5aef8fc8996d 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
screamer 7:5aef8fc8996d 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
screamer 7:5aef8fc8996d 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
screamer 7:5aef8fc8996d 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
screamer 7:5aef8fc8996d 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
screamer 7:5aef8fc8996d 17 */
screamer 7:5aef8fc8996d 18
screamer 0:f2524261196f 19 #include "mbed.h"
screamer 0:f2524261196f 20 #include "WiflyInterface.h"
screamer 0:f2524261196f 21
screamer 4:c45472e3e931 22 /** On some platforms USBTX/USBRX overlaps with serial on D1/D0 pins and this may interrupt the communication.
screamer 4:c45472e3e931 23 * You can comment it and use an LCD display to print the values or store them on an SD card etc.
screamer 2:61d5dde0c4b4 24 */
screamer 4:c45472e3e931 25 Serial pc(USBTX, USBRX);
screamer 1:ced62d2a69f9 26
screamer 0:f2524261196f 27 /**
screamer 0:f2524261196f 28 * D1 - TX pin (RX on the WiFi side)
screamer 0:f2524261196f 29 * D0 - RX pin (TX on the WiFi side)
screamer 1:ced62d2a69f9 30 * NC - Reset pin; use D5 otherwise the shield might get into reset loop
screamer 0:f2524261196f 31 * LED1 - TCP status pin
screamer 0:f2524261196f 32 * "ssid" - hostspot name
screamer 0:f2524261196f 33 * "password" - hotspot passowrd
screamer 0:f2524261196f 34 * security method - NONE, WEP_128, WPA, WPA2
screamer 0:f2524261196f 35 */
screamer 1:ced62d2a69f9 36 WiflyInterface eth(D1, D0, D5, LED1, "hotspot", "", NONE);
screamer 0:f2524261196f 37
screamer 0:f2524261196f 38 int main()
screamer 0:f2524261196f 39 {
screamer 1:ced62d2a69f9 40 wait(3);
screamer 1:ced62d2a69f9 41
screamer 1:ced62d2a69f9 42 // Initialize the interface.
screamer 1:ced62d2a69f9 43 // If no param is passed to init() then DHCP will be used on connect()
screamer 1:ced62d2a69f9 44 int s = eth.init();
screamer 1:ced62d2a69f9 45 if (s != NULL) {
screamer 1:ced62d2a69f9 46 printf(">>> Could not initialise. Halting!\n");
screamer 0:f2524261196f 47 exit(0);
screamer 0:f2524261196f 48 }
screamer 0:f2524261196f 49
screamer 1:ced62d2a69f9 50 printf(">>> Get IP address...\n");
screamer 0:f2524261196f 51 while (1) {
screamer 1:ced62d2a69f9 52 s = eth.connect(); // Connect to network
screamer 0:f2524261196f 53
screamer 1:ced62d2a69f9 54 if (s == false || s < 0) {
screamer 1:ced62d2a69f9 55 printf(">>> Could not connect to network. Retrying!\n");
screamer 0:f2524261196f 56 wait(3);
screamer 0:f2524261196f 57 } else {
screamer 1:ced62d2a69f9 58 break;
screamer 0:f2524261196f 59 }
screamer 0:f2524261196f 60 }
screamer 6:f80c278ca79c 61 //printf(">>> Got IP address: %s\n", eth.getIPAddress());
screamer 1:ced62d2a69f9 62
screamer 1:ced62d2a69f9 63 // Prepare the http request to mbed.org
screamer 1:ced62d2a69f9 64 char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n";
screamer 1:ced62d2a69f9 65 TCPSocketConnection sock;
screamer 1:ced62d2a69f9 66 sock.connect("mbed.org", 80);
screamer 1:ced62d2a69f9 67 sock.send_all(http_cmd, sizeof(http_cmd)-1);
screamer 6:f80c278ca79c 68 //printf(">>> Sent request to mbed.org\n");
screamer 1:ced62d2a69f9 69
screamer 1:ced62d2a69f9 70 // Read the response
screamer 1:ced62d2a69f9 71 char buffer[300];
screamer 1:ced62d2a69f9 72 int ret;
screamer 1:ced62d2a69f9 73 while (true) {
screamer 1:ced62d2a69f9 74 ret = sock.receive(buffer, sizeof(buffer)-1);
screamer 1:ced62d2a69f9 75 if (ret <= 0)
screamer 1:ced62d2a69f9 76 break;
screamer 1:ced62d2a69f9 77 buffer[ret] = '\0';
screamer 1:ced62d2a69f9 78 printf(">>> Received %d chars from mbed.org:\n%s\n", ret, buffer);
screamer 1:ced62d2a69f9 79 }
screamer 1:ced62d2a69f9 80 sock.close();
screamer 1:ced62d2a69f9 81
screamer 1:ced62d2a69f9 82 // Disconnect from network
screamer 1:ced62d2a69f9 83 eth.disconnect();
screamer 1:ced62d2a69f9 84 return 0;
screamer 0:f2524261196f 85 }