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
- Committer:
- screamer
- Date:
- 2014-05-12
- Revision:
- 2:61d5dde0c4b4
- Parent:
- 1:ced62d2a69f9
- Child:
- 4:c45472e3e931
File content as of revision 2:61d5dde0c4b4:
#include "mbed.h" #include "WiflyInterface.h" /** On many platforms USBTX/USBRX overlap with serial on D1/D0 pins and enabling the below will interrupt the communication. * You can use an LCD display to print the values or store them on an SD card etc. */ //Serial pc(USBTX, USBRX); /** * D1 - TX pin (RX on the WiFi side) * D0 - RX pin (TX on the WiFi side) * NC - Reset pin; use D5 otherwise the shield might get into reset loop * LED1 - TCP status pin * "ssid" - hostspot name * "password" - hotspot passowrd * security method - NONE, WEP_128, WPA, WPA2 */ WiflyInterface eth(D1, D0, D5, LED1, "hotspot", "", NONE); int main() { wait(3); // Initialize the interface. // If no param is passed to init() then DHCP will be used on connect() int s = eth.init(); if (s != NULL) { printf(">>> Could not initialise. Halting!\n"); exit(0); } printf(">>> Get IP address...\n"); while (1) { s = eth.connect(); // Connect to network if (s == false || s < 0) { printf(">>> Could not connect to network. Retrying!\n"); wait(3); } else { break; } } printf(">>> Got IP address: %s\n", eth.getIPAddress()); // Prepare the http request to mbed.org char http_cmd[] = "GET /media/uploads/mbed_official/hello.txt HTTP/1.0\n\n"; TCPSocketConnection sock; sock.connect("mbed.org", 80); sock.send_all(http_cmd, sizeof(http_cmd)-1); printf(">>> Sent request to mbed.org\n"); // Read the response char buffer[300]; int ret; while (true) { ret = sock.receive(buffer, sizeof(buffer)-1); if (ret <= 0) break; buffer[ret] = '\0'; printf(">>> Received %d chars from mbed.org:\n%s\n", ret, buffer); } sock.close(); // Disconnect from network eth.disconnect(); return 0; }