Little is there to find online about a nano io shield, besides this explanation : "Nano IO shield is a breakout board for Arduino Nano. It breaks out all pins as Electronic brick 3pin interface, the Zigbee XBee Series Modules and nRF24L01 wireless interface. And it supports 7-12V external power supply.", can someone explain to me the main functions of this hardware?
If this is what you are referring to (see below) the board is simply a method of allowing easy connections to different other boards and I/O connections. From what I see it has no electronic components, only sockets. Some of the sockets are arranged to accept specific other boards (such as XBee)
Im not to familiar with arduino shields, i thought that they had some kind of use other than providing easier connecting with other boards and i/o connections.