Adaptive Alpha Sign text message

Projects General Guidance
26

Hex code from your friend:
00 00 00 00 00 01 Z00 02 AA 1B 20 1C 31

00 00 00 00 00 > five NUL characters
01 > SOH (HEX)
Z00 > Z = type code (all signs), 00 sign address (ASCII)
02 > STX (HEX)
AA > A = Write text file command, A = file label (ASCII)
1B > ESC (HEX)
20 > Middle Line, Text Centered Vertically (HEX)
1C > Select Character Color (HEX)
31 > Red (HEX)

As a test, see if this code will display anything:


byte command[] = "\x00\x00\x00\x00\x00\x01Z00\x02""AA\x1B\x20\x1C\x31PAIK Auditorium\x04";

void setup() {
  Serial.begin(9600);
  Serial2.begin(9600);
  delay(1000);
  Serial.write(command, sizeof(command) - 1);
  Serial.println();
  for (size_t i = 0; i < sizeof(command) - 1; i++) {
    if (command[i] < 0x10)
      Serial.print('0');
    Serial.print(command[i], HEX);
    Serial.print(' ');
  }
  Serial.println();
  
  Serial2.write(command, sizeof(command) - 1);
}

void loop() {
}

Are you sure you have the RS232 converter wired to the sign correctly?