Builder Class

Detailed Description

A KNXnet/IP client connects to a configuration and management data endpoint of a KNXnet/IP server to send device configuration request frames and to receive device configuration acknowledgment frames. A device configuration request is used to read and write KNXnet/IP device configuration data. When a server receives a configuration request, it responds with a device configuration acknowledgment to confirm the reception of the request.

A device configuration acknowledgment frame contains the ID and status of the communication channel between a KNXnet/IP client and server, as well as the sequence number of the device configuration request frame.

The KNXnet/IP server discards device configuration request frames with unexpected sequence numbers and does not send a device configuration acknowledgment upon receiving them.

In most programs, this class will not be used directly. Instead, the QKnxNetIpTunnel or QKnxNetIpDeviceManagement class is used to establish a functional connection to a KNXnet/IP server.

The following code sample illustrates how to read the device configuration request information sent by a KNXnet/IP client:

auto netIpFrame = QKnxNetIpDeviceConfigurationAcknowledgeProxy::builder()
    .setChannelId(200)
    .setSequenceNumber(250)
    .setStatus(QKnx::NetIp::Error::ConnectionId)
    .create();

If the KNXnet/IP client does not receive a device configuration acknowledgment within the specified timeout or the status of a received acknowledgment frame indicates that errors occurred, the client repeats the device configuration request three times and then terminates the connection by sending a disconnection request frame, QKnxNetIpDisconnectRequestProxy, to the server’s control endpoint.