114 lines
3.1 KiB
Arduino
114 lines
3.1 KiB
Arduino
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/*
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Telnet client
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This sketch connects to a a telnet server (http://www.google.com)
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using an Arduino Wiznet Ethernet shield. You'll need a telnet server
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to test this with.
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Processing's ChatServer example (part of the network library) works well,
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running on port 10002. It can be found as part of the examples
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in the Processing application, available at
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http://processing.org/
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Circuit:
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* Ethernet shield attached to pins 10, 11, 12, 13
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created 14 Sep 2010
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modified 9 Apr 2012
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by Tom Igoe
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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 and IP address for your controller below.
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// The IP address will be dependent on your local network:
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byte mac[] = {
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0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
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};
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IPAddress ip(192, 168, 1, 177);
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// Enter the IP address of the server you're connecting to:
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IPAddress server(1, 1, 1, 1);
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// Initialize the Ethernet client library
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// with the IP address and port of the server
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// that you want to connect to (port 23 is default for telnet;
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// if you're using Processing's ChatServer, use port 10002):
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EthernetClient client;
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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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// start the Ethernet connection:
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Ethernet.begin(mac, ip);
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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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// Check for Ethernet hardware present
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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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while (true) {
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delay(1); // do nothing, no point running without Ethernet hardware
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}
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}
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while (Ethernet.linkStatus() == LinkOFF) {
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Serial.println("Ethernet cable is not connected.");
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delay(500);
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}
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// give the Ethernet shield a second to initialize:
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delay(1000);
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Serial.println("connecting...");
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// if you get a connection, report back via serial:
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if (client.connect(server, 10002)) {
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Serial.println("connected");
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} else {
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// if you didn't get a connection to the server:
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Serial.println("connection failed");
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}
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}
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void loop() {
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// if there are incoming bytes available
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// from the server, read them and print them:
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if (client.available()) {
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char c = client.read();
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Serial.print(c);
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}
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// as long as there are bytes in the serial queue,
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// read them and send them out the socket if it's open:
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while (Serial.available() > 0) {
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char inChar = Serial.read();
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if (client.connected()) {
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client.print(inChar);
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}
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}
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// if the server's disconnected, stop the client:
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if (!client.connected()) {
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Serial.println();
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Serial.println("disconnecting.");
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client.stop();
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// do nothing:
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while (true) {
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delay(1);
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}
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}
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}
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