/// <summary>
/// 发送并读取报文
/// </summary>
/// <param name="agent">通信代理</param>
/// <param name="cmd">命令</param>
/// <param name="data">正文</param>
/// <returns>响应的报文</returns>
internal static byte[] SendAndRead(this SerialPortsUtils.Agents.Agent agent, byte cmd, byte[] data = null)
{
var packet = PacketUtils.BuildSend(cmd, data);
var reader = new ReadFilter(cmd);
return(agent.SendAndRead(packet, reader));
}