Arduino Serial Sample

sample.ino

/*
Here's a quick sample of how my Serial code worked. Sadly my Mac stopped responding, so I lost my actual code
*/

void loop() {
  // If there is anything in the serial buffer from the Pi, handle it
  if (Serial.available()) {
    byte value = Serial.read()
    
    // If the byte retrieved is a '1'
    if ((char) value == '1') {
      // Send current data
    }
  }
}