Example program for the SeeedStudio GPRS Shield V2.0, based on UART serial port connectivity (D0/D1 pins). This program connects to GPRS APN, obtains an IP address and downloads http://mbed.org/media/uploads/mbed_official/hello.txt
Dependencies: GPRSInterface mbed
main.cpp
- Committer:
- screamer
- Date:
- 2014-05-13
- Revision:
- 0:b7a3f482f82c
- Child:
- 1:1204f875bde4
File content as of revision 0:b7a3f482f82c:
#include "mbed.h" #include "GPRSInterface.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) * 115200 - Baud rate * "apn" - APN name * "username" - APN username * "password" - APN passowrd */ GPRSInterface eth(D1, D0, 115200, "apn", "username", "password"); 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; }