49 lines
1.7 KiB
Arduino
49 lines
1.7 KiB
Arduino
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#include <QTRSensors.h>
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// This example is designed for use with six QTR-1A sensors or the first six sensors of a
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// QTR-8A module. These reflectance sensors should be connected to analog inputs 0 to 5.
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// The QTR-8A's emitter control pin (LEDON) can optionally be connected to digital pin 2,
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// or you can leave it disconnected and change the EMITTER_PIN #define below from 2 to
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// QTR_NO_EMITTER_PIN.
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// The main loop of the example reads the raw sensor values (uncalibrated).
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// You can test this by taping a piece of 3/4" black electrical tape to a piece of white
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// paper and sliding the sensor across it. It prints the sensor values to the serial
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// monitor as numbers from 0 (maximum reflectance) to 1023 (minimum reflectance).
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#define NUM_SENSORS 6 // number of sensors used
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#define NUM_SAMPLES_PER_SENSOR 4 // average 4 analog samples per sensor reading
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#define EMITTER_PIN 2 // emitter is controlled by digital pin 2
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// sensors 0 through 5 are connected to analog inputs 0 through 5, respectively
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QTRSensorsAnalog qtra((unsigned char[]) {0, 1, 2, 3, 4, 5},
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NUM_SENSORS, NUM_SAMPLES_PER_SENSOR, EMITTER_PIN);
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unsigned int sensorValues[NUM_SENSORS];
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void setup()
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{
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delay(500);
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Serial.begin(9600); // set the data rate in bits per second for serial data transmission
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delay(1000);
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}
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void loop()
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{
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// read raw sensor values
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qtra.read(sensorValues);
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// print the sensor values as numbers from 0 to 1023, where 0 means maximum reflectance and
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// 1023 means minimum reflectance
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for (unsigned char i = 0; i < NUM_SENSORS; i++)
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{
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Serial.print(sensorValues[i]);
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Serial.print('\t'); // tab to format the raw data into columns in the Serial monitor
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}
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Serial.println();
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delay(250);
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}
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