94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
/*
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* UIPEthernet UdpClient example.
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*
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* UIPEthernet is a TCP/IP stack that can be used with a enc28j60 based
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* Ethernet-shield.
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*
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* UIPEthernet uses the fine uIP stack by Adam Dunkels <adam@sics.se>
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*
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* -----------------
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*
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* This UdpClient example tries to send a packet via udp to 192.168.0.1
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* on port 5000 every 5 seconds. After successfully sending the packet it
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* waits for up to 5 seconds for a response on the local port that has been
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* implicitly opened when sending the packet.
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*
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* Copyright (C) 2013 by Norbert Truchsess (norbert.truchsess@t-online.de)
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*/
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#include <UIPEthernet.h>
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EthernetUDP udp;
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unsigned long next;
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void setup() {
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Serial.begin(9600);
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uint8_t mac[6] = {0x00,0x01,0x02,0x03,0x04,0x05};
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Ethernet.begin(mac,IPAddress(192,168,0,6));
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next = millis()+5000;
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}
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void loop() {
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int success;
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int len = 0;
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if (((signed long)(millis()-next))>0)
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{
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do
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{
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success = udp.beginPacket(IPAddress(192,168,0,1),5000);
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Serial.print("beginPacket: ");
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Serial.println(success ? "success" : "failed");
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//beginPacket fails if remote ethaddr is unknown. In this case an
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//arp-request is send out first and beginPacket succeeds as soon
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//the arp-response is received.
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}
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while (!success && ((signed long)(millis()-next))<0);
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if (!success )
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goto stop;
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success = udp.write("hello world from arduino");
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Serial.print("bytes written: ");
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Serial.println(success);
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success = udp.endPacket();
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Serial.print("endPacket: ");
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Serial.println(success ? "success" : "failed");
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do
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{
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//check for new udp-packet:
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success = udp.parsePacket();
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}
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while (!success && ((signed long)(millis()-next))<0);
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if (!success )
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goto stop;
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Serial.print("received: '");
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do
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{
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int c = udp.read();
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Serial.write(c);
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len++;
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}
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while ((success = udp.available())>0);
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Serial.print("', ");
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Serial.print(len);
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Serial.println(" bytes");
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//finish reading this packet:
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udp.flush();
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stop:
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udp.stop();
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next = millis()+5000;
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}
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}
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