Panasonic Grid-EYE User Manual page 19

In the Arduino mode, data sampling and transfer will be executed by Arduino mother board;
the program flow diagram is shown below:
Flow-chart steps explained:

Parse the command from PC, such as the command of setting the sampling frequency.

Measurement - Read data from the sensor and send it to PC and smartphone.

If the sampling frequency is updated, then reset the sampling frequency.

Delay applied in the loop, determined by the sampling frequency.
User Manual Grid-EYE Evaluation Kit
18