#include <Wire.h>

void setup() {
  Wire.begin();
  Serial.begin(115200);
  Serial.println("Formato: <direccion> <pin> <estado>");
  Serial.println("Ejemplo: 0x10 0 1 → Enciende LED en pin 0 del esclavo 0x10");
}

void loop() {
  if (Serial.available()) {
    String input = Serial.readStringUntil('\n');
    input.trim();

    if (input.length() == 0) return;

    int s1 = input.indexOf(' ');
    int s2 = input.indexOf(' ', s1 + 1);

    if (s1 == -1 || s2 == -1) {
      Serial.println("Formato incorrecto. Usa: 0x10 0 1");
      return;
    }

    String addrStr = input.substring(0, s1);
    String pinStr  = input.substring(s1 + 1, s2);
    String valStr  = input.substring(s2 + 1);

    uint8_t address = (uint8_t)strtol(addrStr.c_str(), NULL, 0);
    uint8_t ledPin  = pinStr.toInt();
    uint8_t state   = valStr.toInt();

    
    Wire.beginTransmission(address);
    Wire.write(ledPin);
    Wire.write(state);
    Wire.endTransmission();

    Serial.print("Enviado a esclavo 0x");
    Serial.print(address, HEX);
    Serial.print(": pin ");
    Serial.print(ledPin);
    Serial.print(" -> ");
    Serial.println(state ? "ON" : "OFF");
  }
}