Help with socketIO Example

I’d like to get a TCP based connection from an arduino to a node.JS server. I found an example, I’ve tried to run it but its throwing the errors below, would appreciate any help.

Error Messages Arduino: 1.6.6 Hourly Build 2015/09/24 05:43 (Windows 7), Board: “Arduino/Genuino Uno”

WARNING: Category '' in library ArduinoJson is not valid. Setting to 'Uncategorized'
socketio.ino: In function 'void hello(Client&, const char*)':

socketio:19: error: expected unqualified-id before '.' token

socketio.ino: In function 'void setup()':

socketio:38: error: invalid conversion from 'void (*)(Client&, const char*)' to 'void (*)(Client&, ArduinoJson::JsonArray&)' [-fpermissive]

In file included from socketio.ino:6:0:

C:\arduino_1.6.6\libraries\socket.io-arduino-client.2/SocketIOClient.h:56:8: error:   initializing argument 2 of 'void SocketIOClient::setEventHandler(const char*, void (*)(Client&, ArduinoJson::JsonArray&))' [-fpermissive]

   void setEventHandler(const char* eventName, void (*handler)(Client& client, JsonArray& data));

        ^

socketio:39: error: invalid conversion from 'void (*)(Client&, const char*)' to 'void (*)(Client&, ArduinoJson::JsonArray&)' [-fpermissive]

In file included from socketio.ino:6:0:

C:\arduino_1.6.6\libraries\socket.io-arduino-client.2/SocketIOClient.h:56:8: error:   initializing argument 2 of 'void SocketIOClient::setEventHandler(const char*, void (*)(Client&, ArduinoJson::JsonArray&))' [-fpermissive]

   void setEventHandler(const char* eventName, void (*handler)(Client& client, JsonArray& data));

        ^

exit status 1
expected unqualified-id before '.' token

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Arduino Code

#include #include

#include <ArduinoJson.h>
#include <SocketIOClient.h>

EthernetClient ethClient;
SocketIOClient client(ethClient);

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
char hostname[] = "192.168.100.40";
int port = 3000;

// Socket.io "hello" EVENT handler
void hello(Client& client, char const * data) {
    Serial.print("[hello] event happening: ");
    Serial.println(data);
    Client.emit("goodbye", "Arduino here, goodbye!");
}

// Socket.io "goodbye" EVENT handler
void goodbye(Client& client, char const * data) {
    Serial.print("[goodbye] event happening: ");
    Serial.println(data);
    Serial.println("That is all.");
}

void setup() {
    Serial.begin(9600);
    Ethernet.begin(mac);

    if(!client.connect(hostname, port)) {
        Serial.println(F("Not connected."));
    }

    //Event hanlders
    client.setEventHandler("hello", hello);
    client.setEventHandler("goodbye", goodbye);

    //Say hello to the server
    client.emit("hello", "Arduino here, hello!");
}

void loop() {
    client.monitor();
}

SocketIOClient.h

/*
	socket.io-arduino-client: a Socket.IO client for the Arduino

	Based on Bill Roy's Arduino Socket.IO Client (which is based on 
	Kevin Rohling's Arduino WebSocket Client) with event handling by
	@dantaex

	Copyright 2014 Quentin Pigné

	Permission is hereby granted, free of charge, to any person
	obtaining a copy of this software and associated documentation
	files (the "Software"), to deal in the Software without
	restriction, including without limitation the rights to use,
	copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the
	Software is furnished to do so, subject to the following
	conditions:
	
	The above copyright notice and this permission notice shall be
	included in all copies or substantial portions of the Software.
	
	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
	OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
	HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef SocketIOClient_H
#define SocketIOClient_H

#include <Arduino.h>
#include <Client.h>
#include <SPI.h>

#include <ArduinoJson.h>

#include "HashMap.h"

//Length of static data buffers
#define DATA_BUFFER_LEN 200
#define SID_LEN 24

//Max size of the HashTable
#define HASH_SIZE 20

class SocketIOClient {
	public:
		SocketIOClient(Client& client);
		//Public connection methods
		bool connect(const char* hostname, int port = 80, const char* resource = "socket.io", const char* nsp = "/");
		//Public event handling methods
		void setEventHandler(const char* eventName, void (*handler)(Client& client, JsonArray& data));
		//Public data emitting methods
		void emit(const char* event, const char* data);
		//Monitoring for incoming data
		void monitor();

	private:
		//Connection attributes
		Client& client;
		char* hostname;
		int port;
		char* resource;
		char* nsp;
		char sid[SID_LEN];
		//Incoming data reading attributes
		char databuffer[DATA_BUFFER_LEN];
		char* dataptr;
		//Event handling attributes
		int nbEvent;
		static HashType<const char*, void(*)(Client& client, JsonArray& data)> hashRawArray[HASH_SIZE];
		static HashMap<const char*, void(*)(Client& client, JsonArray& data)> eventHandlers;

		//Private incoming data reading methods
		bool waitForInput();
		void eatHeader();
		void readInput();
};

#endif

#include #includeIS that really in the code that you are compiling ?

Please can you provide a link to where you got the libraries used in your program.

Hi, thanks for your reply!

UKHeliBob: IS that really in the code that you are compiling ?

No sorry that was a typo.

UKHeliBob: Please can you provide a link to where you got the libraries used in your program.

The code is found here https://github.com/quentinpigne/socket.io-arduino-client/tree/master/examples/arduino-chat