public async void DisplayMessage(string msg)
{
var cmd = new byte[1 + Math.Min(msg.Length, 65)];
cmd[0] = CMD_LCD;
var chars = msg.ToCharArray();
for (int i = 1; i < cmd.Length; i++)
{
cmd[i] = (byte)chars[i - 1];
}
await Serial.BlindCommand(cmd);
}
