2.4 Data Visualizer
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The next thing we need is to visualize data to calibrate sensors or something else.
Fortunatly a monitor comes with the "Atmel Studio IDE" called "Data Visualizer".
Of course it would be more convenient to have, for example an LCD to show the current values. But we don't have enough pins on the ATMega328P to realize it. So we are reliant to the well working monitor. (Yes, of course you should use an I2C-LCD but it's not part of this tutorial. Maybe later.)