Is it possible to detect connected devices in Wifi AP mode?

[stc1988]

I am trying to use QR codes for Wi-Fi configuration by applying webConfigWifi application.

My plan is adding processing for when a smartphone connects to the MCU in AP mode, but there is no way to detect connected devices.

[phoddie]

The WiFi class callback on ESP32 provides two callbacks related to this:

• "station_connect" for when a new connection to the AP is established (ESP-IDF WIFI_EVENT_AP_STACONNECTED message)
• "station_disconnect" for when a connection to the AP is lost (ESP-IDF WIFI_EVENT_AP_STADISCONNECTED message)

I'm not sure about the details of integrating this into webConfigWifi but these messages could be used to achieve the result you describe.

[stc1988]

Thank you for reply.

This code works to monitor msg station_connect and station_disconnect

    WiFi.accessPoint({
      ssid: AP_NAME,
      password: AP_PASSWORD,
    });

    let monitor = new WiFi(null, msg => {
      trace(`${msg}\n`)
    })

[phoddie]

Nice. That works because you can have more than one Wi-Fi monitor instance active at the same time. That avoids a conflict with webConfigWifi (which also has a Wi-Fi instance).

[stc1988]

This is short demo.
https://x.com/stc1988/status/1787422792687780059

After connect to access point, screen shows next QR code that open configuration URL.

[phoddie]

Very cool. Thanks for sharing the video.