UDP Socket Hello World with Ethernet
Dependencies: mbed mbed-rtos EthernetInterface
mbed 2 and mbed OS 5
This is an mbed 2 example. For an mbed-os example, please see:
[Repository '/teams/mbed-os-examples/code/mbed-os-example-sockets/docs/tip/' not found]
main.cpp
- Committer:
- Kojto
- Date:
- 2014-05-14
- Revision:
- 10:1992d8ec32d2
- Parent:
- 7:dedf5dde9798
File content as of revision 10:1992d8ec32d2:
#include "mbed.h" #include "EthernetInterface.h" int main() { EthernetInterface eth; eth.init(); //Use DHCP eth.connect(); UDPSocket sock; sock.init(); Endpoint nist; nist.set_address("utcnist.colorado.edu", 37); char out_buffer[] = "plop"; // Does not matter sock.sendTo(nist, out_buffer, sizeof(out_buffer)); char in_buffer[4]; int n = sock.receiveFrom(nist, in_buffer, sizeof(in_buffer)); unsigned int timeRes = ntohl( *((unsigned int*)in_buffer)); printf("Received %d bytes from server %s on port %d: %u seconds since 1/01/1900 00:00 GMT\n", n, nist.get_address(), nist.get_port(), timeRes); sock.close(); eth.disconnect(); while(1) {} }