If you're using a non-W Plasma 2350 + RM2 module combo and want to use it with these wireless examples, you can save a copy of ezwifi.py to your board and modify the following line:
self._if = network.WLAN(network.STA_IF)
to the following, to specify the correct pins for the wireless module:
self._if = network.WLAN(network.STA_IF, pin_on=8, pin_out=11, pin_in=11, pin_wake=11, pin_clock=10, pin_cs=9)
Perhaps there's a nicer way of doing this?