Hello Eloy,
A few thoughts.
OWFS already provides data in a single-file-format, such as branch.ALL,
volt.ALL...
These .ALL registers appear to be grouped by a logical and common
purpose. If future device support were to be fashioned against what may
be considered an existing "standard", grouping dissimilar data in a
single register would be a departure. This would mean that an exception
exists within an otherwise consistent interface. I would caution that
one exception quickly leads to another and typically does not end well.
One of the beauties of OWFS is that a structure information is provided
to give us the layout for each One Wire device and their data format.
If a single file contains several disparate elements, how will this be
reflected in the structure?
I have, many times, chased after problems that did not exist. These
learning experiences are valuable, but some can be expensive. So
considering the problem can we assume that it is believed a performance
issue exists (reading three files rather than one)? It would be helpful
to know if the difference will be meaningful enough to justify the efforts.
/m
On 11/5/2011 07:41, Eloy Paris wrote:
Hello developers,
I am working on a 1-Wire device that provides multi-sensor data, i.e.
temperature, humidity, luminosity. I'd like to be able to have an OWFS
file that allows me to do this:
$ cat /owfs2/uncached/99.010203040506/environs; echo
temp=25.2 RH=48% light=252
This would allow for easy parsing of environmental data without having
to access different files, i.e. one file for temperature, another for
humidity, etc.
I am not sure about how to best set up the struct filetype entry to
accomplish this. In particular, what should I use for the suglen and
format fields?
In looking at the possibilities, it seems to me like ft_vascii for the
format is something that could work, but then I am not sure about what
to use for the suglen field (I guess I could use the largest length that
could be produced).
Any thoughts on the approach I am considering or if there is a better
way to do this?
Thanks in advance.
Cheers,
Eloy Paris.-
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