Add support for Wi-Fi Provisioning

[nic0lette]

Is your feature request related to a problem? Please describe.

Typing WiFi connection information on the badge is cumbersome :)

Describe the solution you'd like

Espressif has an API that allows using an app [iOS / Android] to scan a WiFi QR code and transmit the credentials to an ESP32 device. It seems (at first glance) that this would be a helpful thing to provide.

Describe alternatives you've considered

• It's possible to use Thonny or mpremote to edit /settings.json, but it's a bit clunky (especially before setting up a new WiFi config since the keys aren't saved when using the default wifi credentials)
• If there were an app that would allow an iOS / Android device to act as a BLE HID that would be much more flexible and enable more applications than just configuring WiFi.

Additional context

I'm unsure if the current version of IDF supports this API, or if it needs to be configured.

[MatthewWilkes]

Does this use BLE Improv? I feel that's a really good candidate.

[Jonty]

I don't think it does, but Improv (https://www.improv-wifi.com) should be relatively easy to implement over USB at least - I looked into this last year but got lost in a twisty maze of micropython. There's also yet another wifi provisioning thing for esp32 that I used recently and have totally forgotten what it's called.

[Jonty]

This does look relatively easy to implement though, and given it's Espressif's official API I suspect this will quickly win out, at least in the ESP32 world: https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/provisioning/wifi_provisioning.html