For WiPy 1.3 the firmware is here: http://micropython.org/download/
There's also a short instruction on how to update.

wlan = WLAN(mode=WLAN.STA)

Once you execute this statement, any connection to the AP is lost. If you want to keep the AP connection in addition to the station mode, run

wlan = WLAN(mode=WLAN.STA_AP)

wlan.connect(ssid='mynetwork', auth=(WLAN.WPA2, 'my_network_key'))
while not wlan.isconnected():
    print(".", end="")
wlan.ifconfig(config=('my.new.static.ip', '255.255.255.0', 'gateway_ip', 'gateway_ip'))
print("\n", wlan.ifconfig())

Which connects to your router and sets a static ip, which is more convenient if you want to connect with your computer both to your Internet and your WiPy. The values for my.new.static.ip and gateway.ip depend on the setting of your router. Typical setting for the gateway_ip are 192.168.0.1. But you can tell by issuing the command /sbin/route -n under linux/mac or ipconfig under Windows in the command shell.

while not wlan.isconnected():
    print(".", end="")

Also, the IP you give to your WiPy is in a different net than the router. So if 192.168.478.198 is the IP of your gateway, the IP of your WiPy should be 192.168.478.xxx.
But you could remove (or comment out) line 8 which sets the IP parameters and just see what you router assigns to the WiPy.