Arduino Socket.io Communicate

Question

How can i send Data from Socket.io (NodeJs Server) to arduino ? I have a ESP8266 Wifi Shield , Can i send and receive data ? If i can there is any basic example for it ? How can i use the Arduino Socket Client ? I find like this example

Can I Use like this ?

#include <SPI.h> #include <Ethernet.h> #include "SocketIOClient.h" SocketIOClient client; byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; char hostname[] = ""; // Socket.io "chat_message" event handler void chat_message(EthernetClient ethclient, char *data ){ Serial.print("Message : "); Serial.println(data); } void setup() { Serial.begin(9600); Ethernet.begin(mac); Serial.print("Arduino is on "); Serial.println(Ethernet.localIP()); if(client.connect(hostname, 3000, "socket.io", "/chat_room")) { Serial.println("Socket.IO connected !"); } else { Serial.println("Socket.IO not connected."); } //Event hanlders client.setEventHandler("chat_message", chat_message); //Say hello! to the server client.emit("chat_message", "Arduino here, hello!"); } void loop() { client.monitor(); }

cagdas · Accepted Answer · 2016-11-08 12:06:40Z

Socket.IO is an API for WebSockets and most of Websocket libraries are supporting it.

I am pretty happy with this most contributed Arduino WebSocket library and it also supports Socket.IO. Here is your Socket.IO example.

Here is a heartbeat message type of socket.io implementaiton from the example:

if((now - heartbeatTimestamp) > HEARTBEAT_INTERVAL) { heartbeatTimestamp = now; // socket.io heartbeat message webSocket.sendTXT("2"); }

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