Page 5
Grove shield

A grove shield is needed to connect Grove modules to the Arduino board. SeeedStudio offers four kinds of Grove shields. The specific one for the Arduino MKR board is the Arduino MKR Connector Carrier.
The Arduino MKR Connector Carrier is a printed circuit board (PCB), providing Seeed Studio’s Grove connectors to an MKR board. The microcontroller is plugged into the board socket. All the ports become available through Grove connectors on the sides of the PCB. The Grove system allows several components to connect to your project using connectors instead of soldering.
Give yourself a pause.
Find the Arduino MKR Connector Carrier in the box of components.
Would you mind opening it and familiarising yourself with it? Please have a good look at its construction. Identify the sockets where the Arduino board fits. Identify the analog (e.g., A0, A1, etc.) and digital (e.g., D0, D1, etc.) input/output grove connectors. These connectors are where you will have to plug the cable to connect it to a sensor (or an actuator).
Continue to Page 6 – Building the circuit.