toPacket method
toPacket returns the packet in the format of Layrz Protocol v3.
Definition:
<Pa>IMEI;PASSWORD;CRC16</Pa>
Implementation
@override
String toPacket() {
String payload = '$ident;$password;';
String crc = calculateCrc(payload.codeUnits).toRadixString(16).padLeft(4, '0').toUpperCase();
return '<Pa>$payload$crc</Pa>';
}