96 lines
2.5 KiB
Arduino
96 lines
2.5 KiB
Arduino
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/*
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DHCP-based IP printer
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This sketch uses the DHCP extensions to the Ethernet library
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to get an IP address via DHCP and print the address obtained.
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using an Arduino Wiznet Ethernet shield.
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Circuit:
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Ethernet shield attached to pins 10, 11, 12, 13
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created 12 April 2011
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modified 9 Apr 2012
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by Tom Igoe
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modified 02 Sept 2015
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by Arturo Guadalupi
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*/
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#include <SPI.h>
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#include <Ethernet.h>
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// Enter a MAC address for your controller below.
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// Newer Ethernet shields have a MAC address printed on a sticker on the shield
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byte mac[] = {
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0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02
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};
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void setup() {
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// You can use Ethernet.init(pin) to configure the CS pin
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//Ethernet.init(10); // Most Arduino shields
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//Ethernet.init(5); // MKR ETH shield
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//Ethernet.init(0); // Teensy 2.0
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//Ethernet.init(20); // Teensy++ 2.0
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//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
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//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
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// Open serial communications and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for native USB port only
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}
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// start the Ethernet connection:
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Serial.println("Initialize Ethernet with DHCP:");
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if (Ethernet.begin(mac) == 0) {
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Serial.println("Failed to configure Ethernet using DHCP");
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if (Ethernet.hardwareStatus() == EthernetNoHardware) {
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Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
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} else if (Ethernet.linkStatus() == LinkOFF) {
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Serial.println("Ethernet cable is not connected.");
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}
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// no point in carrying on, so do nothing forevermore:
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while (true) {
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delay(1);
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}
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}
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// print your local IP address:
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Serial.print("My IP address: ");
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Serial.println(Ethernet.localIP());
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}
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void loop() {
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switch (Ethernet.maintain()) {
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case 1:
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//renewed fail
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Serial.println("Error: renewed fail");
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break;
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case 2:
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//renewed success
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Serial.println("Renewed success");
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//print your local IP address:
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Serial.print("My IP address: ");
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Serial.println(Ethernet.localIP());
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break;
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case 3:
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//rebind fail
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Serial.println("Error: rebind fail");
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break;
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case 4:
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//rebind success
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Serial.println("Rebind success");
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//print your local IP address:
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Serial.print("My IP address: ");
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Serial.println(Ethernet.localIP());
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break;
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default:
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//nothing happened
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break;
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}
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}
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