Heyo, I'm trying to get WebSockets to work with an ESP32 (az-deliver

ESP32 + ENC28J60 = tcpip_send_msg_wait_sem about arduinowebsockets HOT 1 OPEN

KoffeinKaio commented on June 11, 2024 1

ESP32 + ENC28J60 = tcpip_send_msg_wait_sem

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Comments (1)

builder26 commented on June 11, 2024

Hello,
I'm having the exact same problem. Versions 2.0.11 and 2.0.10 produce this error. You can use my example too:

#include <WebServer.h>
#include <WiFiClient.h>
#include <WiFiAP.h>


const char *ssid = "test";
const char *password = "1234";

WebServer server(80);

void handleRoot(){
  server.send(200, "text/plain", "Hi there!");

}


void setup() {
  Serial.begin(115200);
  WiFi.softAP(ssid, password);
  delay(100);
  IPAddress myIP = WiFi.softAPIP();
  Serial.println(myIP);
  Serial.println("Server started");

  server.on("/", handleRoot);
  server.begin();
  delay(2000);
  Serial.println("Server up");
}


void loop() {
  server.handleClient();
  delay(1);
}

Output:

load:0x40080400,len:3600
entry 0x400805f0
0.0.0.0
Server started

assert failed: tcpip_send_msg_wait_sem IDF/components/lwip/lwip/src/api/tcpip.c:455 (Invalid mbox)


Backtrace: 0x400835a1:0x3ffca6d0 0x4008b6e1:0x3ffca6f0 0x40090b61:0x3ffca710 0x400ed2c2:0x3ffca840 0x400fd6ad:0x3ffca870 0x400fd70d:0x3ffca890 0x400ecab1:0x3ffca8e0 0x400d4476:0x3ffca900 0x400d44f0:0x3ffca950 0x400d645d:0x3ffca970 0x400d27e5:0x3ffca990 0x400d924a:0x3ffca9f0

I've tried to completely erase the flash and reprogram the board with no success. Also, I've tried with version 1.0.6 and it works.

Edit:
In my case, the solution was to add this line, you may need to change some parameters for your specific case. I believe in the previous versions this was not needed.