/*
Visualizes the movement of a finger over a series of capacitive sensors.
>> http://www.kobakant.at/DIY/?p=6607
Based on the CVDSense Library Demo Sketch by Admar Schoonen 2016.
>> https://github.com/admarschoonen/CVDSensor
IMPORTANT: Needs a minimum of 2 capacitive sensors. When using only one
sensor, set N_SENSORS to 2 and use an unused analog input pin for the second
sensor.
*/

#include
#ifdef __AVR__
#include
#endif
#define PIN 6
#define NUMPIXELS 5
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

#include
#define N_SENSORS 5
int pinRemap[] = {1,4,3,2,0};
#define N_MEASUREMENTS_PER_SENSOR 16 // Number of measurements per sensor to take in one cycle. More measurements means more noise reduction / spreading, but is also slower

CvdSensors cvdSensors; // cvdSensors is the actual object that contains all the sensors

void setup()
{
Serial.begin(115200);
cvdSensors.data[0].pin = 0; /* Analog pin 0 */
cvdSensors.data[0].enableSlewrateLimiter = true;
cvdSensors.data[1].pin = 1; /* Analog pin 2 */
cvdSensors.data[1].enableSlewrateLimiter = true;
cvdSensors.data[2].pin = 2; /* Analog pin 2 */
cvdSensors.data[2].enableSlewrateLimiter = true;
cvdSensors.data[3].pin = 3; /* Analog pin 2 */
cvdSensors.data[3].enableSlewrateLimiter = true;
cvdSensors.data[4].pin = 4; /* Analog pin 2 */
cvdSensors.data[4].enableSlewrateLimiter = true;
cvdSensors.data[5].pin = 5; /* Analog pin 2 */
cvdSensors.data[5].enableSlewrateLimiter = true;
cvdSensors.printScanOrder();
strip.begin();
}

void loop()
{
static int prev = millis();
cvdSensors.sample();
for (int i = 0; i < NUMPIXELS; i++) { int sensorData = cvdSensors.data[pinRemap[i]].delta; Serial.print(sensorData); Serial.print("\t"); if (sensorData > 100 || sensorData < -100) { strip.setPixelColor(i, strip.Color(100, 0, 0)); // Moderately bright green color. strip.show(); // This sends the updated pixel color to the hardware. } else { strip.setPixelColor(i, strip.Color(0, 0, 0)); strip.show(); } } Serial.println(); delay(10); }