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--- en:iot-open:practical:hardware:rtu:esp32:scenarios:tcs [2025/07/31 18:04] – created kivilands6
+++ en:iot-open:practical:hardware:rtu:esp32:scenarios:tcs [2025/10/28 17:47] (current) – [Example] raivo.sell
@@ Line 1: / Line 1: @@
+====== ESP32 TCS34725 =====
+This is an example of the TCS34725 reading rgb color code from neopixel, and displaying it on lcd
+===== Prequisits ====
+<code>
+lib_deps = adafruit/Adafruit LiquidCrystal@^2.0.2
+</code>
+===== Example ====
+<code>
+#include <Arduino.h>
+#include <Wire.h>
+#include <Adafruit_LiquidCrystal.h>
+#include <Adafruit_TCS34725.h>
+#include <Adafruit_NeoPixel.h>
+/* NEOPIXEL */
+void colorWipe(uint32_t color, int wait);
+#define LED_PIN 12
+#define LED_COUNT 8
+Adafruit_NeoPixel strip(LED_COUNT, LED_PIN);
+#define SDA_PIN 17
+#define SCL_PIN 16
+#define LCD_RS 48
+#define LCD_ENABLE 47
+#define LCD_D4 34
+#define LCD_D5 33
+#define LCD_D6 26
+#define LCD_D7 21
+static Adafruit_LiquidCrystal lcd(LCD_RS, LCD_ENABLE, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
+/* TCS34725 */
+#define commonAnode true
+byte gammatable[256];
+Adafruit_TCS34725 tcs = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_50MS, TCS34725_GAIN_4X);
+void setup() {
+  Serial.begin(152000);
+  // Initialize I2C on custom pins
+  Wire.begin(SDA_PIN, SCL_PIN);
+  // Initialize LCD
+  if (!lcd.begin(16, 2)) {
+    Serial.println("Could not init LCD");
+    while (1);
+  }
+  Serial.println("LCD ready.");
+  lcd.print("IOT-OPEN");
+  strip.begin();
+  strip.show();
+  /* TCS34725 setup */
+  if (tcs.begin()) {
+    //Serial.println("Found sensor");
+  } else {
+    Serial.println("No TCS34725 found ... check your connections");
+    while (1); // halt!
+  }
+  // it helps convert RGB colors to what humans see
+  for (int i=0; i<256; i++) {
+    float x = i;
+    x /= 255;
+    x = pow(x, 2.5);
+    x *= 255;
+    if (commonAnode) {
+      gammatable[i] = 255 - x;
+    } else {
+      gammatable[i] = x;
+    }
+    //Serial.println(gammatable[i]);
+  }
+}
+<refnotes>
+back-ref-format : none
+</refnotes>
+void loop() {
+  strip.clear();
+  colorWipe(strip.Color(0, 0, 255), 50);
+  strip.show();
+  //tcs code
+  float red, green, blue;
+  tcs.setInterrupt(false);
+  delay(60);  // takes 50ms to read
+  tcs.getRGB(&red, &green, &blue);
+  tcs.setInterrupt(true);
+  lcd.setCursor(0, 1);
+  lcd.print("r: ");
+  lcd.print(int(red));
+  lcd.print("g: ");
+  lcd.print(int(green));
+  lcd.print("b: ");
+  lcd.print(int(blue));
+  delay(3000);
+  strip.clear();
+  colorWipe(strip.Color(255, 0, 0), 50);
+  strip.show();
+  tcs.setInterrupt(false);
+  delay(60);  // takes 50ms to read
+  tcs.getRGB(&red, &green, &blue);
+  tcs.setInterrupt(true);
+  lcd.setCursor(0, 1);
+  lcd.print("r: ");
+  lcd.print(int(red));
+  lcd.print("g: ");
+  lcd.print(int(green));
+  lcd.print("b: ");
+  lcd.print(int(blue));
+  delay(3000);
+}
+//for neopixel
+void colorWipe(uint32_t color, int wait) {
+  for(int i = 0; i < strip.numPixels(); i++) {
+    strip.setPixelColor(i, color);
+    strip.show();
+    delay(wait);
+  }
+}
+</code>