Using Arduino's BLE, we can create a terminal and plotter similar to the Arduino IDE. The plotter's width can also be changed over time with your finger. Operation has been confirmed with the ESP32_BleSerial library. In addition to the free version, we have added filters and basic FFT analysis functions. If Arduino's `millis` value is in the first column, it is used as the basis for Plot and FFT analysis. *Up to 2,000 lines, starting from the end, will be saved.
