chromeos/test/data/network/wifi_dhcp.onc

{
    "GUID": "{b3e26c32-4289-41ea-b2a4-d0554acb1f67}",
    "IPAddressConfigType": "DHCP",
    "Name": "Wifi With DHCP",
    "Type": "WiFi",
    "WiFi": {
        "AutoConnect": true,
        "HexSSID": "576966695769746844484350", // "WifiWithDHCP"
        "Passphrase": "some passphrase",
        "Security": "WPA-PSK"
    }
}