Grove is a modular, standardized connector prototyping system. Grove takes a building block approach to assembling electronics. Compared to the jumper or solder based system, it is easier to connect, experiment and build and simplifies the learning system, but not to the point where it becomes dumbed down.
Grove connector on both ends. Grove connector on one end with pin input on the other.
The grove connectors are used for interfacing both analog and digital sensors.
In the above diagram the sensor is powered through the VCC and GND. Data is through (A) for analog or (D) for digital.
Each grove connector has two digital (D0, D1) or analog (A0, A1) lines.