| /* | |
| Telnet client | |
| This sketch connects to a a telnet server (http://www.google.com) | |
| using an Arduino Wiznet Ethernet shield. You'll need a telnet server | |
| to test this with. | |
| Processing's ChatServer example (part of the network library) works well, | |
| running on port 10002. It can be found as part of the examples | |
| in the Processing application, available at | |
| http://processing.org/ | |
| Circuit: | |
| * Ethernet shield attached to pins 10, 11, 12, 13 | |
| created 14 Sep 2010 | |
| modified 9 Apr 2012 | |
| by Tom Igoe | |
| */ | |
| // Enter a MAC address and IP address for your controller below. | |
| // The IP address will be dependent on your local network: | |
| byte mac[] = { | |
| 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED | |
| }; | |
| IPAddress ip(192, 168, 1, 177); | |
| // Enter the IP address of the server you're connecting to: | |
| IPAddress server(1, 1, 1, 1); | |
| // Initialize the Ethernet client library | |
| // with the IP address and port of the server | |
| // that you want to connect to (port 23 is default for telnet; | |
| // if you're using Processing's ChatServer, use port 10002): | |
| EthernetClient client; | |
| void setup() { | |
| // You can use Ethernet.init(pin) to configure the CS pin | |
| //Ethernet.init(10); // Most Arduino shields | |
| //Ethernet.init(5); // MKR ETH shield | |
| //Ethernet.init(0); // Teensy 2.0 | |
| //Ethernet.init(20); // Teensy++ 2.0 | |
| //Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet | |
| //Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet | |
| // start the Ethernet connection: | |
| Ethernet.begin(mac, ip); | |
| // Open serial communications and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| // Check for Ethernet hardware present | |
| if (Ethernet.hardwareStatus() == EthernetNoHardware) { | |
| Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); | |
| while (true) { | |
| delay(1); // do nothing, no point running without Ethernet hardware | |
| } | |
| } | |
| while (Ethernet.linkStatus() == LinkOFF) { | |
| Serial.println("Ethernet cable is not connected."); | |
| delay(500); | |
| } | |
| // give the Ethernet shield a second to initialize: | |
| delay(1000); | |
| Serial.println("connecting..."); | |
| // if you get a connection, report back via serial: | |
| if (client.connect(server, 10002)) { | |
| Serial.println("connected"); | |
| } else { | |
| // if you didn't get a connection to the server: | |
| Serial.println("connection failed"); | |
| } | |
| } | |
| void loop() { | |
| // if there are incoming bytes available | |
| // from the server, read them and print them: | |
| if (client.available()) { | |
| char c = client.read(); | |
| Serial.print(c); | |
| } | |
| // as long as there are bytes in the serial queue, | |
| // read them and send them out the socket if it's open: | |
| while (Serial.available() > 0) { | |
| char inChar = Serial.read(); | |
| if (client.connected()) { | |
| client.print(inChar); | |
| } | |
| } | |
| // if the server's disconnected, stop the client: | |
| if (!client.connected()) { | |
| Serial.println(); | |
| Serial.println("disconnecting."); | |
| client.stop(); | |
| // do nothing: | |
| while (true) { | |
| delay(1); | |
| } | |
| } | |
| } | |