Modify the code

examples/Slave/Slave.ino

@@ -1,56 +1,132 @@
 #include <Wire.h>
+#include <EEPROM.h>
 #include <Adafruit_NeoPixel.h>
 
-#define I2C_DEV_ADDR 0x55
-#define NEOPIXEL_PIN 19 // Change as needed
-#define MAX_PIXELS 100
+#define DEFAULT_ADDRESS 0x08
+#define DEFAULT_LED_COUNT 30
+#define MAX_NAME_LENGTH 24
+#define LED_PIN 6
 
-Adafruit_NeoPixel strip(MAX_PIXELS, NEOPIXEL_PIN, NEO_GRB + NEO_KHZ800);
+struct Config {
+  uint8_t address;
+  char deviceName[MAX_NAME_LENGTH+1];
+  uint16_t ledCount;
+  uint8_t brightness;
+};
 
-uint8_t pixelCount = 1;
+Config config;
+Adafruit_NeoPixel strip;
 
-void receiveEvent(int len) {
-  delay(50); // Add more delay for stability as requested
-
-  if (len < 1) return;
-  uint8_t cmd = Wire.read();
-
-  if (cmd == 0x01 && len >= 2) { // Set pixel count
-    pixelCount = Wire.read();
-    strip.updateLength(pixelCount);
-    strip.begin();
-    strip.show();
-  }
-  else if (cmd == 0x02 && len >= 5) { // Set all pixels: R G B I
-    uint8_t r = Wire.read();
-    uint8_t g = Wire.read();
-    uint8_t b = Wire.read();
-    uint8_t intensity = Wire.read();
-    for (int i = 0; i < pixelCount; i++) {
-      strip.setPixelColor(i, strip.Color(r * intensity / 255, g * intensity / 255, b * intensity / 255));
-    }
-    strip.show();
-  }
-  else if (cmd == 0x03 && len >= 6) { // Set one pixel: N R G B I
-    uint8_t n = Wire.read();
-    uint8_t r = Wire.read();
-    uint8_t g = Wire.read();
-    uint8_t b = Wire.read();
-    uint8_t intensity = Wire.read();
-    if (n < pixelCount) {
-      strip.setPixelColor(n, strip.Color(r * intensity / 255, g * intensity / 255, b * intensity / 255));
-      strip.show();
-    }
-  }
-}
+void handleCommand(int numBytes);
+void saveConfig();
+void loadConfig();
+void updateStrip();
 
 void setup() {
+  Serial.begin(115200);
+  EEPROM.begin(sizeof(Config));
+  loadConfig();
+  
+  strip = Adafruit_NeoPixel(config.ledCount, LED_PIN, NEO_GRB + NEO_KHZ800);
   strip.begin();
-  strip.show();
-  Wire.begin(I2C_DEV_ADDR, 8, 9); // ESP32-S3 default I2C pins: SDA=8, SCL=9
-  Wire.onReceive(receiveEvent);
+  strip.setBrightness(config.brightness);
+  strip.show(); // Initialize all off
+
+  Wire.onReceive(handleCommand);
+  Wire.onRequest([]() {
+    String response = String(config.address) + ",LED-Strip," + 
+                     config.deviceName + "," + 
+                     String(config.ledCount) + "," +
+                     String(config.brightness);
+    Wire.print(response);
+  });
+  
+  Wire.begin(config.address);
 }
 
-void loop() {
-  delay(100); // Main loop delay, not critical
+void loop() { /* Empty */ }
+
+void handleCommand(int numBytes) {
+  uint8_t cmd = Wire.read();
+  
+  switch(cmd) {
+    case 0xA0: // Set individual pixel
+      if(numBytes >= 5) {
+        uint8_t pixel = Wire.read();
+        uint8_t r = Wire.read();
+        uint8_t g = Wire.read();
+        uint8_t b = Wire.read();
+        
+        if(pixel < config.ledCount) {
+          strip.setPixelColor(pixel, strip.Color(r, g, b));
+          updateStrip();
+        }
+      }
+      break;
+      
+    case 0xA1: // Set all pixels
+      if(numBytes >= 4) {
+        uint8_t r = Wire.read();
+        uint8_t g = Wire.read();
+        uint8_t b = Wire.read();
+        
+        for(int i=0; i<config.ledCount; i++) {
+          strip.setPixelColor(i, strip.Color(r, g, b));
+        }
+        updateStrip();
+      }
+      break;
+      
+    case 0xA2: // Set brightness
+      if(numBytes >= 2) {
+        config.brightness = Wire.read();
+        strip.setBrightness(config.brightness);
+        saveConfig();
+        updateStrip();
+      }
+      break;
+      
+    case 0xB0: // Clear all
+      strip.clear();
+      updateStrip();
+      break;
+      
+    case 0xC0: // Set address
+      if(numBytes >= 2) {
+        config.address = Wire.read();
+        saveConfig();
+        Wire.begin(config.address);
+      }
+      break;
+      
+    case 0xD0: // Set LED count
+      if(numBytes >= 3) {
+        config.ledCount = Wire.read() << 8;
+        config.ledCount |= Wire.read();
+        saveConfig();
+        strip.updateLength(config.ledCount);
+        updateStrip();
+      }
+      break;
+  }
+}
+
+void updateStrip() {
+  strip.show();
+}
+
+void loadConfig() {
+  EEPROM.get(0, config);
+  if(config.address < 0x08 || config.address > 0x77) {
+    config.address = DEFAULT_ADDRESS;
+    config.ledCount = DEFAULT_LED_COUNT;
+    config.brightness = 255;
+    strcpy(config.deviceName, "LED Controller");
+    saveConfig();
+  }
+}
+
+void saveConfig() {
+  EEPROM.put(0, config);
+  EEPROM.commit();
 }