HTTPS WebSocket reconnect loop on ESP32 (Wizard 1.0.3 / Mongoose 7.22 / ESP-IDF 5.5.4)

[dmsergei]

Hello,

I'm developing an ESP32 application using a project generated by Mongoose Wizard.

Environment

• Mongoose Wizard 1.0.3
• Mongoose 7.22
• ESP-IDF 5.5.4
• ESP32-WROOM-32E
• MG_TLS_BUILTIN

The Web UI is generated by Mongoose Wizard.

I have not modified the generated WebSocket implementation.

The project only uses the standard Wizard websocket reporters.

---

Problem

Everything works correctly over HTTP.

As soon as I enable the HTTPS listener, WebSocket connections start reconnecting continuously.

---

What works

✓ HTTP page

✓ HTTPS page

✓ Login

✓ Authentication

✓ Cookie authentication

✓ HTTP REST API

✓ WebSocket handshake (HTTP 101 Switching Protocols)

---

What does not work

The WebSocket connection stays alive for approximately one second and then closes.

The browser immediately opens a new WebSocket connection.

This repeats forever.

Chrome Network shows:

websocket 101
websocket 101
websocket 101
websocket 101
...

Each connection lasts approximately one second.

---

Browser observations

Chrome Network:

• WebSocket handshake returns HTTP 101
• Browser reconnects continuously

Browser console:

connection to wss:///websocket was interrupted

Some reconnect attempts also produce:

Failed to load resource:
net::ERR_CONNECTION_RESET

---

UART logs

A successful connection looks like this:

GET /websocket 101

followed by websocket traffic.

Then:

mg_ws_cb WS CLOSE

followed by:

mg_close_conn closed

Immediately afterwards the browser opens a new HTTPS connection.

Some reconnect attempts fail during the TLS handshake:

TLS ALERT received:
level=2
desc=46 (certificate_unknown)

TLS Fatal alert

The next reconnect usually succeeds and again reaches:

GET /websocket 101

---

HTTP vs HTTPS

If I completely disable the HTTPS listener:

HTTP + WebSocket works correctly and remains connected.

As soon as I enable the HTTPS listener:

• HTTP page still works
• HTTPS page works
• Login works
• WebSocket starts reconnecting continuously

---

HTTP listener

mg_http_listen(&mgr, HTTP_URL, http_ev_handler, NULL);
<img width="766" height="1056" alt="HTTPS" src="https://github.com/user-attachments/assets/4fa7140b-013b-48bf-96e9-483bbbb74e84" />

[scaprile]

Hello, this is the Mongoose library repository. Here we develop the code for the Mongoose library, Wizard usage issues or questions do not belong here.
Please address your Wizard questions to the Wizard Discord, whose link is in the Wizard screen where you got your Wizard code generated.
Thank you.

PS: The issue template is there to save yours and our time. Please fill it as requested, do not post huge chunks of TL;DR AI-generated comments that only add noise and steer the focus, Thank you again.