(:source http://arduino.cc/en/pub/code/master/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino lang=arduino tabwidth=4:)

• A telnet server
• Alternatively, Processing has a ChatServer example that works well for this purpose

This example connects to a Telnet server using an Ethernet shield. Messages from the server are printed out via the serial port. Messages can be sent to the remote server serially as well. The Serial monitor works well for this purpose.

• A telnet server (Processing has a ChatServer example that works well for this purpose)

Examples > Ethernet Library

Telnet Client

This example shows you how to answer a HTTP request using an Ethernet shield. Specifically, it connects to twitter.com, The example requires you to set up a twitter.com account. Your Ethernet shield will then connect to that account and send a tweet.

(:div class=BOM :) Hardware Required

• Arduino Ethernet Shield
• Shield-compatible Arduino board

Software Required

• processing

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Circuit (:div class=circuit :)

The Ethernet shield allows you to connect a WizNet Ethernet controller to the Arduino via the SPI bus. It uses pins 10, 11, 12, and 13 for the SPI connection to the WizNet. Later models of the Ethernet shield also have an SD Card on board. Digital pin 4 is used to control the slave select pin on the SD card.

The shield should be connected to a network with an ethernet cable. You will need to change the network settings in the program to correspond to your network.

image developed using Fritzing. For more circuit examples, see the Fritzing project page

In the above image, your Arduino would be stacked below the Ethernet shield.

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Code

(:div class=code :) (:includeurl http://arduino.cc/en/pub/code/master/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino border=0:) (:divend:)

See Also:

• Arduino Ethernet Shield
• Getting started with the ethernet shield
• Ethernet library
• ChatServer
• WebClient
• WebServer
• PachubeCient
• TwitterClient
• BarometricPressureWebServer