Making Things Talk

If you’re trying to use any of the Ethernet examples or the Wifi example straight from the 2nd edition of Making Things Talk, you’re probably getting some errors related to the definition of Client and Server. Here’s how to fix them.

For Arduino 1.0-rc1 and beyond there are new abstract Client and Server classes for both the Ethernet boards and shields and the coming Wifi shields. To accommodate this, the Ethernet client class is now called EthernetClient, and the Ethernet server class is called EthernetServer. Likewise  the wifi client class is called WiFiClient and the wifi server class is WiFiServer. This means that you should change your class declarations. For example, what used to be


Client client;


is now


EthernetClient client;


and


Server server(80);


would now be


EthernetServer server(80);


Similarly for WiFi:


Client client;


is now


WiFiClient client;


and


Server server(80);


would now be


WiFiServer server(80);


The rest of your code should remain unchanged and still compile.

The examples in the  book affected by this are as follows:

Chapter 4

• RGBWebWerver
•  SimpleWebServer
• AqiWebClient
• SerialToEthernet

Chapter 5

• BalancePongClient
• JoystickPongClient

Chapter 6

• WifiRGBServer

Chapter 9

• TwitterRFIDWebClient
• HostIpWebClient

Chapter 10

• GetPostWebServer
• TwilioWebServer

The code on my GitHub site for all of these examples is up to date with Arduino 1.0-rc1.