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Con questo video imparerai ad usare un sensore di colore con Arduino.
A partire dai collegamenti passando per il codice degli sketch scoprirai come individuare il colore degli oggetti e delle superfici.
#define S0_PIN 2#define S1_PIN 3#define S2_PIN 4#define S3_PIN 5#define OUT_PIN 6 int red;int green;int blue;int clear; void setup() { Serial.begin(9600); pinMode(S0_PIN, OUTPUT); pinMode(S1_PIN, OUTPUT); pinMode(S2_PIN, OUTPUT); pinMode(S3_PIN, OUTPUT); pinMode(OUT_PIN, INPUT); // Power down digitalWrite(S0_PIN, LOW); digitalWrite(S1_PIN, LOW);} void loop() { updateRGB(); Serial.print("Rosso: "); Serial.print(red); Serial.print(" - Verde: "); Serial.print(green); Serial.print(" - Blu: "); Serial.print(blue); Serial.print(" - Luce: "); Serial.println(clear); delay(500);} void updateRGB() { // Frequency 20% digitalWrite(S0_PIN, HIGH); digitalWrite(S1_PIN, LOW); delay(10); red = 0; green = 0; blue = 0; clear = 0; for (int i = 0; i < 5; i++) { digitalWrite(S2_PIN, LOW); digitalWrite(S3_PIN, LOW); red += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S2_PIN, HIGH); clear += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S3_PIN, HIGH); green += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S2_PIN, LOW); blue += pulseIn(OUT_PIN, LOW); delay(1); } red /= 5; green /= 5; blue /= 5; clear /= 5; // Power down digitalWrite(S0_PIN, LOW); digitalWrite(S1_PIN, LOW);}
#include <LiquidCrystal_I2C.h> #define S0_PIN 2#define S1_PIN 3#define S2_PIN 4#define S3_PIN 5#define OUT_PIN 6 #define WHITE_THRESHOLD 15#define BLACK_THRESHOLD 55 int red;int green;int blue;int clear; LiquidCrystal_I2C lcd(0x27, 16, 2); void setup() { Serial.begin(9600); lcd.init(); lcd.backlight(); pinMode(S0_PIN, OUTPUT); pinMode(S1_PIN, OUTPUT); pinMode(S2_PIN, OUTPUT); pinMode(S3_PIN, OUTPUT); pinMode(OUT_PIN, INPUT); // Power down digitalWrite(S0_PIN, LOW); digitalWrite(S1_PIN, LOW);} void loop() { updateRGB(); String color = getColor(); lcd.clear(); lcd.setCursor(0, 0); lcd.print(" COLORE "); lcd.setCursor(0, 1); int space = (16 - color.length()) / 2; for (int i = 0; i < space; ++i) { lcd.print(" "); } lcd.print(color); delay(500);} void updateRGB() { // Frequency 20% digitalWrite(S0_PIN, HIGH); digitalWrite(S1_PIN, LOW); delay(10); red = 0; green = 0; blue = 0; clear = 0; for (int i = 0; i < 5; i++) { digitalWrite(S2_PIN, LOW); digitalWrite(S3_PIN, LOW); red += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S2_PIN, HIGH); clear += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S3_PIN, HIGH); green += pulseIn(OUT_PIN, LOW); delay(1); digitalWrite(S2_PIN, LOW); blue += pulseIn(OUT_PIN, LOW); delay(1); } red /= 5; green /= 5; blue /= 5; clear /= 5; // Power down digitalWrite(S0_PIN, LOW); digitalWrite(S1_PIN, LOW);} String getColor() { float R_G = (float)red / green; float G_B = (float)green / blue; float B_R = (float)blue / red; if (R_G > 0.75 && R_G < 1.1 && G_B > 0.9 && G_B < 1.4 && B_R > 0.75 && B_R < 1.5) { if (clear <= WHITE_THRESHOLD) { return "Bianco"; } else if (clear >= BLACK_THRESHOLD) { return "Nero"; } return "Grigio"; } else if (R_G <= 0.8 && G_B >= 1.1 && G_B <= 1.4 && B_R >= 1.2) { return "Rosso"; } else if (R_G > 0.9 && G_B < 1.2 && B_R < 1.45) { return "Verde"; } else if (R_G >= 0.9 && G_B >= 1.2 && B_R < 0.8) { return "Blu"; } else if (R_G >= 0.7 && G_B < 1.2 && B_R >= 1) { return "Giallo"; } else if (R_G < 0.8 && G_B < 1.3 && B_R >= 1) { return "Arancione"; } else if (G_B > 1.35 && B_R >= 1.1) { return "Rosa"; } else if (R_G < 0.9 && B_R < 1.2) { return "Viola"; } return "";}
