USB Comms?

[Eddy5]

I'm trying to write a small app to read and log data from a weather station connected over USB (Oregon Scientific RMS300 which uses the WMR100 protocol).

Is there a way in AutoIt to read data packets from such a USB device?

[martin]

I'm trying to write a small app to read and log data from a weather station connected over USB (Oregon Scientific RMS300 which uses the WMR100 protocol).

Is there a way in AutoIt to read data packets from such a USB device?

AFAIK only if the usb driver simulates a serial port and surprisingly maybe, many pieces of equipment do just that. So unplug the device and look in Device Manager and see what Communication ports you have .(Probably Com1 and Com2.) Plug the device in and have another look at what com ports there are. If another one has appeared you are in luck, otherwise I am afraid I have no idea.

[ptrex]

@Eddy5

This is the API's you need Read / Write USB devices

and this one More API's

So far the theory.

regards

ptrex

Edited October 22, 2008 by ptrex

[martin]

@Eddy5

This is the API's you need Read / Write USB devices

and this one More API's

So far the theory.

regards

ptrex

Wow, great link, thanks ptrex. When I read articles like that I just know I can take over the world. (I just need a liiiittle bit more time.)

[Eddy5]

Thanks for the info guys. It's definitely a USB HID device so I'll have to get reading up on it.

[Eddy5]

I've found a DLL that sound do the trick

http://www.codeproject.com/KB/cs/USB_HID.aspx

and here

http://groups.google.com/group/usb_net/bro...a665ed504bfc697

The zip file contains the DLL and an EXE that is capable of reading the data from the weather station so I'm pretty sure this is the DLL to use.

Now I just need to work out how to use the DLL in AutoIt.

Here's some of the code (C I think) from the application

this.usb.ProductId = 51713;
            this.usb.VendorId = 4062;
            this.usb.Shared = usbShared;
            this.usb.OnSpecifiedDeviceRemoved += new System.EventHandler(this.usb_OnSpecifiedDeviceRemoved);
            this.usb.OnDeviceArrived += new System.EventHandler(this.usb_OnDeviceArrived);
            this.usb.OnDeviceRemoved += new System.EventHandler(this.usb_OnDeviceRemoved);
            this.usb.OnDataRecieved += new UsbLibrary.DataRecievedEventHandler(this.usb_OnDataRecieved);
            this.usb.OnSpecifiedDeviceArrived += new System.EventHandler(this.usb_OnSpecifiedDeviceArrived);
            this.usb.OnDataSend += new System.EventHandler(this.usb_OnDataSend);
            
            usbBuffer = new byte[256];
            workingBuffer = new byte[256];
            usbRecord = new byte[10][];
            for (int i = 0; i < usbRecord.Length; i++)
            {
                usbRecord[i] = new byte[i + 128];
            }

private void usb_OnDataRecieved(object sender, DataRecievedEventArgs args)
        {
            if (InvokeRequired)
            {
                try
                {
                    Invoke(new DataRecievedEventHandler(usb_OnDataRecieved), new object[] { sender, args });
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
            }
            else
            {
                string rec_data = "";
                foreach (byte myData in args.data)
                {
                    if (myData.ToString("x").Length == 1)
                    {
                        rec_data += "0";
                    }

                    rec_data += myData.ToString("x") + " ";
                }

                Array.Copy(args.data, 2, usbBuffer, myBufferPos, (int)args.data[1]);
                myBufferPos += (int)args.data[1];
                // to remove 1st byte
                this.lb_read.Items.Add(rec_data.Substring(3));
            }
        }

Edited October 23, 2008 by Eddy5

[Eddy5]

I'm getting a bit stuck with this. Not really sure what I'm doing to be honest. If anyone has any advice on the AutoIt commands to get me going (i.e. how do I actually get AutoIt to get anything meaningful from the USBLibrary.dll or HID.dll) I'd be very grateful.

[ptrex]

@martin

You are welcome.

I am curious to see with what you come up with.

Regards

ptrex