Wi-Fi

Overview

The phone reaches your laptop over USB, but the internet (to download the AI models, for example) goes over Wi-Fi. Nerves configures networking with VintageNet; VintageNetWiFi's quick_ functions cover the common cases (not enterprise networks). The phone remembers the network after a reboot.

This follows the "Configure WiFi" notebook of the official Nerves Livebook. If the firmware was built with the venue's network (see below), the phone is already connected and you can skip to the last cell.

Pick a network

First, the networks the phone can see. The first scan after boot can come back empty; run it again if yours is missing.

networks = VintageNetWiFi.quick_scan()

Kino.DataTable.new(networks,
  name: "Wi-Fi networks",
  keys: [:ssid, :signal_percent, :frequency, :flags]
)

Pick your network and type its password (leave it empty for an open network):

if networks == [] do
  raise "No networks found yet: run the scan above again."
end

ssid_input =
  Kino.Input.select("Network", Enum.map(networks, &{&1.ssid, &1.ssid}))
  |> Kino.render()

password_input = Kino.Input.password("Password")

Connect

Then connect:

VintageNetWiFi.quick_configure(Kino.Input.read(ssid_input), Kino.Input.read(password_input))

After a few seconds this should say :internet:

VintageNet.get(["connection"])

Building the firmware with the venue's network

A workshop organiser can build the firmware with the venue's Wi-Fi, so every phone joins it on first boot:

FP3_WIFI_SSID="venue-network" FP3_WIFI_PASSPHRASE="secret" mix firmware