Simple Message on an LED Scroller with Alpha Protocol

alphaScroller.ino

// Commands for Alpha Sign Communication Protocol
byte NUL = 0x00;
byte START_HEADER = 0x01;
byte START_TEXT = 0x02;
byte END_TRANSMISSION = 0x04;
byte ESC = 0x1B;
byte FILL = 0x30;
byte ROTATE = 0x61;
byte SLOW = 0x15;
byte FAST = 0x19;
byte TIME = 0x13;
byte CALL_STRING = 0x10;
byte CALL_SIZE = 0x1A;
byte SIZE_LARGE = 0x33;
byte SIZE_SMALL = 0x31;


void setup() {
  Serial.begin(9600);
  writeText("If you can read this, you've got it working!");
}


void loop() {
  
  
}


void writeText(String text) {
  Serial.write(NUL); // Start frame sync chars
  Serial.write(NUL);
  Serial.write(NUL);
  Serial.write(NUL);
  Serial.write(NUL); // end frame sync chars
  Serial.write(START_HEADER); // start of header
  Serial.write("Z00"); // all sign types, all addresses
  Serial.write(START_TEXT); //start of text
  Serial.write("AA"); // write command, text file A
  Serial.write(ESC);
  Serial.write(FILL);
  Serial.write(ROTATE);
  Serial.print(text);
  Serial.write(END_TRANSMISSION);
}