What is the TransmogriShield described in https://allseenalliance.org/developers/develop/tutorial/arduino-and-gt202
Is the shield the product in http://store.arduino.cc/product/A000058?
I couldn't understand what role the shield is because the WiFi function is provided by GT202.
If I have already had GT202 kit and Arduino Due, I can connect Arduino Due to GT202 with SPI directy.
Why should the Arduino Due need to connect to the shield first and then make the shield connect to GT202?