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The sensor forms an image and OpenCV detects the actual touch configuration. It appears you can use the raw data from the Arduino, too, but it might be a little harder.
Components Required Arduino Uno or Nano 16x2 LCD Display (with I2C module for easier wiring) Touch Sensor (e.g., TTP223) Jumper Wires Breadboard (optional) Wiring Connections LCD Display (I2C) ...