#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(); // Default SDA = D4, SCL = D5 on XIAO ESP32-C3
}

void loop() {
  Wire.beginTransmission(0x08);      // Slave address

  // Send the string byte by byte
  const char* msg = "Hello from ESP32-C3!";
  while (*msg) {
    Wire.write(*msg);  // Write each character as a byte
    msg++;
  }

  Wire.endTransmission();

  Serial.println("Sent to RP2040");
  delay(1000);
}