[libhid-discuss] problems with libhid and Oregon Scientific weather station WMRS203 (interrupt read)

[Jordi Puigsegur]

My plans are to add support for this type of weather station to an existing
open source weather server, wview. The software runs on a variety of *nix
operating systems and I would like to take an approach that is most standard
and more likely to work on many *nix systems. The sofware also runs on SBC
computers like NLSU, Sheeva plug, etc.

Therefore my goal should be to take the aproach that will be more likely to
work on any *nix system. So far I see that there are several options:

* user space solution: libusb + libhid

* hidraw driver API
I suppose that most *nix have this driver loaded on the kernel. What I don't
understand is what you suggest about the possibility of writting a backend
for libhid using hidraw driver.

* usbserial
I don't know much about this option and I don't know if this specific device
can run using this driver. Data is received through an interrupt but it
seems that the reset command is transfered using control_data, not a write
interrupt.


Thanks,
Jordi.

2009/7/30 Peter Stuge <peter at stuge.se>

> Jordi Puigsegur wrote:
> > [   78.544058] usb 4-1: new low speed USB device using uhci_hcd and
> address 3
> > [   78.718640] usb 4-1: configuration #1 chosen from 1 choice
> > [   78.735138] generic-usb 0003:0FDE:CA01.0002: hiddev96,hidraw1: USB HID
> v1.10 Device [Universal Bridge] on usb-0000:00:1d.0-1/input0
> >
> > The last three lines appear when the weather station is plugged in
> > the computer. Someone has pointed me out that in Ubuntu Jaunty the
> > usbserial is built-in in the kernel, however I don't see it in
> > dmesg. I suppose that is not the problem.
>
> If I were you I would just program the hidraw API directly to begin
> with. Then maybe look into making a hidraw backend for libhid.
>
> Is portability across many operating systems important for you?
>
>
> //Peter
>
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