I'm new to the Python hidapi although I've used the C version that it is based on before. The Python library is really different and I can't figure out how to use it from the one example that is provided. Does anyone know of any good documentation for this library?
If you're looking for a specific question, I'm trying to open an HID device that has multiple usages. My device has the following relevant characteristics:
vendor_id: 10618
product_id: 4
usage: 8
usage_page: 1
interface_number: 1
I have tried using hid_enumerate to select the dictionary that I want but after instantiating the device object the device will not open even though I know it's there (since it is listed in enumerate).
Although I would still like to find some decent documentation, after using the C hidapi header for reference I found an answer to my original question. In order to specify the usage, you must use open_path() instead of the regular open() method (see below):
import hid
#Get the list of all devices matching this vendor_id/product_id
vendor_id = 10618
product_id = 4
device_list = hid.enumerate(vendor_id, product_id)
#Find the device with the particular usage you want
device_dict = (device in device_list if device['usage'] == '8').next()
device = hid.device()
device.open_path(device_dict['path']) #Open from path