socketio server not connecting to ESP8266 - socket.io

Question

I am facing problems while connecting to my SocketIo server through my ESP8266.
I have my ESP connected to my Wifi and my Node Server is running on localhost.
I have the following code in ESP8266
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
#include <SocketIoClient.h>
//192.168.1.37 --My IP Address
SocketIoClient webSocket;
const char* ssid = "ssid"; // SSID
const char* password = "pass"; // Password
const char* host = "192.168.1.37"; // Server IP (localhost)
const int port = 8080; // Server Port
const char* url = "http://localhost:8080/test";
void event(const char * payload, size_t length) {
Serial.println("Message");
}
void setup() {
Serial.begin(115200);
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500); // 5ms Delay
Serial.print(".");
}
Serial.print("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.println("Connecting To Socket");
webSocket.on("event", event);
webSocket.begin("192.168.1.37", 8080);
}
void loop() {
if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
delay(3000); //Send a request every 3 seconds
webSocket.loop();
Serial.println("Retrying ....");
}
Also my Server side code is in JavaScript.
var io = socket(server);
io.on('connection', (socket) => {
console.log('made socket connection', socket.id);
socket.on("ESP", function(data){
socket.emit('Hi ESP, ESP called', data);
console.log("Socket Working !");
});
console.log('made socket connection', socket.id);
socket.on("connect", function(data){
socket.emit('Hi ESP connect called', data);
console.log("Socket Working !");
});
});
But i keep on receiving this output in the Serial Monitor.
Also there is no request received on my server.
11:37:09.729 -> ..........WiFi connected
11:37:14.129 -> IP address:
11:37:14.129 -> 192.168.1.13
11:37:14.129 -> Connecting To Socket
11:37:17.245 -> Retrying ....
11:37:17.245 -> [SIoC] Disconnected!
11:37:17.245 -> [SIoC] event disconnected not found. 1 events available
11:37:20.230 -> Retrying ....
11:37:20.230 -> [SIoC] Disconnected!
11:37:20.230 -> [SIoC] event disconnected not found. 1 events available

Answer 1

i have same issue
[SIoC] Disconnected!
[SIoC] Connected to url: /socket.io/?transport=websocket
[SIoC] Disconnected!
[SIoC] Disconnected!
[SIoC] Disconnected!
i change server side socket io config to this :
const io = require("socket.io")(server, {
cors: {
origin: "*",
methods: ["GET", "POST"],
transports: ["websocket", "polling"],
credentials: true,
},
allowEIO3: true,
});
and Fix !

Answer 2

I have faced the same issue. It is fixed when I changed the socket.io version to ^2.3.0
Change the socket io version to ^2.3.0 in package.json, delete node modules and reinstall the packages using npm install command

Answer 3

I had the same issue and changed:
WiFi.begin(ssid, password);
to
WiFiMulti.addAP(ssid, pass);
and it connects fine.
PS: I used <SocketIOclient.h>