Wireless access point mode using the Red switch - Mraanderson/HBG3 GitHub Wiki
Configure "Access Point" mode to connect it to a phone hotspot or home WiFi. From the Arduino console or other Telnet connection:
set wlan.ssid MyHomeSSID
set wlan.passkey MyWiFiPasskey
save
And flip the Red switch to the up position for Access Point mode.
Down on the switch (or no switch) sets direct connection WiFi.