Resolving errors in Arduino - arduino

Question

I am working on a project, and I am trying to get a grasp of it. Using the WiShield. I have been trying to complete the example program for a simple tweeter. However, I have had no luck yet. I have been trying to find the solutions, and everything I find never seems to work. How do I fix this problem?
My code is below as well as the errors I receive.
Code
#include <WiServer.h>
#define WIRELESS_MODE_INFRA 1
#define WIRELESS_MODE_ADHOC 2
unsigned char local_ip[] = {192,168,2,2};
unsigned char gateway_ip[] = {192,168,2,1};
unsigned char subnet_mask[] = {255,255,255,0};
const prog_char ssid[] PROGMEM = {"myssid"};
unsigned char security_type = 3; // 0 - open; 1 - WEP; 2 - WPA; 3 - WPA2
const prog_char security_passphrase[] PROGMEM = {"mywifipassword"};
prog_uchar wep_keys[] PROGMEM = {
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 1
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 2
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // Key 3
};
unsigned char wireless_mode = WIRELESS_MODE_INFRA;
unsigned char ssid_len;
unsigned char security_passphrase_len;
// Authentication string for the Twitter account.
char* auth = "[user:pass]"; // Base64 encoded USERNAME:PASSWORD
// This function generates a message with the current system time.
void currentTime() {
WiServer.print("Arduino has been running for ");
WiServer.printTime(millis());
}
// A request that sends a tweet using the currentTime function.
TWEETrequest sentMyTweet(auth, currentTime);
void setup() {
// Initialize WiServer (we'll pass NULL for the page serving function since we don't need to serve web pages).
WiServer.init(NULL);
// Enable Serial output and ask WiServer to generate log messages (optional).
Serial.begin(57600);
WiServer.enableVerboseMode(true);
}
// Time (in milliseconds) when the next tweet should be sent.
long tweetTime = 0;
void loop(){
// Check if it's time to sent a tweet
if (millis() >= tweetTime) {
sentMyTweet.submit();
// Send next tweet 5 minutes from now
tweetTime += 1000 * 60 * 5;
}
// Run WiServer
WiServer.server_task();
delay(10);
}
Errors
In file included from SimpleTweeter.cpp:5:
C:\Program Files (x86)\arduino-1.0\libraries\WiShield/WiServer.h:198: error: conflicting return type specified for 'virtual void Server::write(uint8_t)'
C:\Program Files (x86)\arduino-1.0\hardware\arduino\cores\arduino/Print.h:48: error: overriding 'virtual size_t Print::write(uint8_t)'
SimpleTweeter.pde:-1: error: 'TWEETrequest' does not name a type
SimpleTweeter.cpp: In function 'void loop()':
SimpleTweeter.pde:-1: error: 'sentMyTweet' was not declared in this scope
(I am new to Arduino.)

Answer 1

It looks like the WiServer library hasn't been upgraded to work with Arduino 1.0. In this version of the Arduino software, the return type of the write method in the Print class was changed from void to size_t.
There is a fork of WiShield on GitHub by Juan C. Muller which makes it compatible with Arduino 1.0.
The subsequent error about the type TWEETrequest is a knock-on effect of this previous error.