In file included from C:\Users\Dino\OneDrive\Documenti\Arduino\libraries\ArduinoWebsockets\src/ArduinoWebsockets.h:6:0,
from C:\Users\Dino\OneDrive\Documenti\Arduino\Arduino_Http_testWebSocket\Arduino_Http_testWebSocket.ino:19:
C:\Users\Dino\OneDrive\Documenti\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/server.hpp:10:40: error: expected ')' before '*' token
WebsocketsServer(network::TcpServer*, server = new WSDefaultTcpServer);
^
C:\Users\Dino\OneDrive\Documenti\Arduino\libraries\ArduinoWebsockets\src/tiny_websockets/server.hpp:26:14: error: 'TcpServer' in namespace 'websockets::network' does not name a type
network::TcpServer* _server;
^~~~~~~~~
exit status 1
Compilation error: exit status 1
In the code that you could have easily included in your post thusly:
/*
Esp32 Websockets Client
This sketch:
1. Connects to a WiFi network
2. Connects to a Websockets server
3. Sends the websockets server a message ("Hello Server")
4. Prints all incoming messages while the connection is open
Hardware:
For this sketch you only need an ESP32 board.
Created 15/02/2019
By Gil Maimon
https://github.com/gilmaimon/ArduinoWebsockets
*/
#include <ArduinoWebsockets.h>
#include <WiFiS3.h>
const char* ssid = ""; //Enter SSID
const char* password = ""; //Enter Password
const char* websockets_server_host = ""; //Enter server adress
const uint16_t websockets_server_port = ; // Enter server port
using namespace websockets;
WebsocketsClient client;
void setup() {
Serial.begin(115200);
// Connect to wifi
WiFi.begin(ssid, password);
// Wait some time to connect to wifi
for(int i = 0; i < 10 && WiFi.status() != WL_CONNECTED; i++) {
Serial.print(".");
delay(1000);
}
// Check if connected to wifi
if(WiFi.status() != WL_CONNECTED) {
Serial.println("No Wifi!");
return;
}
Serial.println("Connected to Wifi, Connecting to server.");
// try to connect to Websockets server
bool connected = client.connect(websockets_server_host, websockets_server_port, "/");
if(connected) {
Serial.println("Connected!");
client.send("Hello Server");
} else {
Serial.println("Not Connected!");
}
// run callback when messages are received
client.onMessage([&](WebsocketsMessage message){
Serial.print("Got Message: ");
Serial.println(message.data());
});
}
void loop() {
// let the websockets client check for incoming messages
if(client.available()) {
client.poll();
}
delay(500);
}
I noticed this in the program header:
Esp32 Websockets Client
.
.
.
Hardware:
For this sketch you only need an ESP32 board.
And when I went to the Github repository that the code came from, the "About" section read:
A library for writing modern websockets applications with Arduino (ESP8266 and ESP32)
Although there is an ESP32 on the Uno R4 Wifi, the sketch you are compiling does not run on the ESP32; it runs on the Renesas RA4M1 processor.
It is perhaps not reasonable to expect an example entitled "ESP32-Client" from a library written to support ESP8266 and ESP32 to compile and run on a Renesas RA4M1 processor.
Additionally, there are dozens of open issues with that library going back a few years. Is it possible that the example simply doesn't work? Have you tried compiling it for an ESP32 board to check that?
Your problem was that the code did not compile. My suggestion was to try compiling for an ESP32, not actually running the code on one. You don't actually need an ESP32 to compile the code. Success or failure in that scenario would give you an indication of the state of the example and library themselves with their intended processor.
This post has been long time ago. However, I commented and hope it is helpful for OP or newbies, who reach this thread by searching solution on the internet.
For Arduino Uno R4, It is quite new, and at the time wrote this comment, there is not many tutorials about WebSocket with Arduino Uno R4. You can use mWebSockets library. The library enables Ethernet Shield be default, To change to WiFi, A little modification is needed in the config.h file. You can see the detailed instruction in this Arduino Uno R4 WebSocket Tutorial
