...Because of the Captive Portal and the DNS server you will either get a 'Join to network' type of popup or get any domain you try to access redirected to the configuration portal. ESP will try to connect. If successful, it relinquishes control back to your app. If not, reconnect to AP and reconfigure.
Using the iOS SDK for FreeRTOS Bluetooth Devices, you can create mobile applications that do the following. Scan for and connect to nearby BLE devices running FreeRTOS. Provision Wi-Fi networks for a BLE device running FreeRTOS. Act as a proxy for transmitting MQTT messages between a device running FreeRTOS and the AWS IoT cloud.
With this program you can create your own hublist for DC++. The pinger supports both the old NMDC, and the new ADC protocol, so you can have more hubs on your list than anyone. The program uses MySQL databse. Download and donate if you like it :)