private void Sl_MessageAvailable(Object sender, EventArgs e) => NMEAParser.Parse((Byte[])_sl.MessagesQueue.Dequeue());
/// <summary>Sends a command to the GNSS 4 module.</summary>
/// <param name="cmd">The command, with both the starting '$' and the ending '*'.</param>
public void SendCommand(String cmd)
{
_gnss.Write(Encoding.UTF8.GetBytes($"{cmd}{NMEAParser.CalculateChecksum(Encoding.UTF8.GetBytes(cmd)):X2}\r\n"));
_gnss.Flush();
}