Get Status off relay C#

English
1

Hello im programing an interface in C# to comand my velbus installation with a touch screen. To change the status of the relay there is no problem, i use for every comand a button so i have a button to set the relay and one to reset the relay, but now i want that the button’s also show the status of the relay.

Ex: If the relay is active, Only the OFF button can be used
If the relay is inactive, Only the ON button can be pressed

So i can control the state off the relay.

To disabel the button I use the command

 btnSend1off.Enabled = false;

Can sombody give me a code example to see the state of relay 1 of VMB4RY with adres A0

Thanks

2

You will need to capture the relay status (command FBh)

Address: A0h
Priority: Low
Databytes: 8

Databyte 4 contains the relay status:
0000 0000b Relays off
0000 0001b Relay channel 1 on
0000 0010b Relay channel 2 on
0000 0100b Relay channel 3 on
0000 1000b Relay channel 4 on
0001 0001b Relay channel 1 blinks
0010 0010b Relay channel 2 blinks
0100 0100b Relay channel 3 blinks
1000 1000b Relay channel 4 blinks

The VMB1RY only uses the least significant bit while the VMB4RY uses all four bits to represent each channel.

3

Hello,
Thanks for the reaction, my problem on this stage is that i c’ant find the methode to listen to the serial port :blush: , so i can get the information that is recive on the velbus.

this is wath i get

[code]bus.Open();

        // Prepare a packet that will switch on the relays
        // of a VMB4RY module (see: p.17 of the VMB4RY manual)
        Packet packet = new Packet();
        packet.Address = 0x0A;                  // change this address to reflect your setup
        packet.Priority = PacketPriority.High;  // high priority command
        packet.DataSize = 2;                    // 2 data bytes
        packet.Command = 0x02;                  // Command "Switch relay ON"
        packet[1] = 0x04;                       // We want to switch on relay3

        // Issue the command!
        bus.SendBlocking(packet);

        bus.Send(packet);
        packet.Address = 0x0A;                  // change this address to reflect your setup
        packet.Priority = PacketPriority.Low;  // LOW priority command
        packet.DataSize = 8;                    // 8 data bytes
        packet.Command = 0xFB ;                  // GET STATUS"
        packet[1] = 0x08;

        // Issue the command!
        bus.SendBlocking(packet);

        
        // Be sure to close the bus so everything
        // can be cleaned up properly */
        bus.Close();[/code]

can anybody give me a code or a methode to get the data of the serial connection.

thanks best regards

4 
    public partial class SerialBus
    {
...
        public SerialBus(String portName, int baudRate)
        {
            m_SerialPort = new SerialPort(portName, baudRate);
            m_SerialPort.Parity = Parity.None;
            m_SerialPort.StopBits = StopBits.One;
            m_SerialPort.DataBits = 8;
            m_SerialPort.DtrEnable = false;
            m_SerialPort.RtsEnable = true;
            m_SerialPort.DataReceived += new SerialDataReceivedEventHandler(SerialDataReceivedHandler);
            m_SerialPort.ReceivedBytesThreshold = 1;
            m_Dispatcher = new Dispatcher(this);

            m_Parser = new PacketParser();
        }

        private void SerialDataReceivedHandler(object source, SerialDataReceivedEventArgs args)
        {
            int BytesRead = m_SerialPort.Read(m_InBuffer, 0, m_SerialPort.BytesToRead);
            m_Parser.Feed(m_InBuffer, BytesRead);

            Packet packet = m_Parser.Next();
            while (packet != null)
            {
                TreatePacket(packet); // Treat your packet here
                packet = m_Parser.Next();
            }
        }

}

But all this come from the SerialBus.cs file in the library.

5

Yes you can just use our SerialBus component for .NET (VelbusLib) and handle the PacketReceived event.