[PD] Sensors GPIO Raspberry Pi Pd

Julian Brooks jbeezez at gmail.com
Tue Apr 23 10:42:49 CEST 2013

Hey Martin / all,

Omron tech support finally got back to me re the address issue, this is
what they had to say:

"D6T sensor can not change the address.
When you connect multiple sensors we recommend that you use the IC
Please refer to the below document.


I've been through the spec sheet several times and don't see anything
(admittedly not sure exactly what I'm looking for though) that relates to
IC switching.

We've still got 2 of these doing nothing currently if they could be brought
into action:

Or people on the RPi forum seem to have got the 2nd i2c pins going but that
seems to be for rev.2 boards only (I think - have posted a question on the
thread to ask).

Also asked tech support about the PEC errors but no response to that one.

I've noticed that the PEC doesn't trigger errors all the time so am
wondering if it's possible to filter the errors out of the data somehow in
the C file?

Still delighted though - the sensors great!



On 22 April 2013 00:20, Julian Brooks <jbeezez at gmail.com> wrote:

> Wonder if it's a difference between rev boards on the Pi?
> I've also built a custom image based on Hexxeh's minimal install which is
> working great for audio stuff.  My Pd patch that wouldn't run without
> overclocking on a standard Raspian is now working fine on the rev1 256mg
> board.  So I've been adding stuff as and when it comes up to try and keep t
> is minimal as poss.
> I'm also not sure what installed libi2c-dev?  Guess I'll have to wait and
> see what squeals.
> Of possible interest is this message when removing the lib with apt-get:
> The following packages will be REMOVED:
>   libi2c-dev
> 0 upgraded, 0 newly installed, 1 to remove and 11 not upgraded.
> After this operation, 19.5 kB disk space will be freed.
> Do you want to continue [Y/n]? y
> (Reading database ... 33610 files and directories currently installed.)
> Removing libi2c-dev ...
> Removing 'diversion of /usr/include/linux/i2c-dev.h to
> /usr/include/linux/i2c-dev.h.kernel by libi2c-dev'
> So guess the diversion was messing with the compile for the C code.
> Anyway - code runs and I can compile C files too so all ok so far.
> Thanks again for everything Martin,
> Julian
> On 21 April 2013 06:45, Martin Peach <martin.peach at sympatico.ca> wrote:
>> On 2013-04-20 21:09, Julian Brooks wrote:
>>> Oh and btw
>>> Still don't know why I can't compile the .c files on the pi with
>>> libi2c-dev installed but I can't.  Presuming the compiling is working
>>> for you Martin?
>> Yes it works for me. I don't have the same /usr/include/linux/i2c-dev.h
>> as you so no redefinition errors, not sure which package(s) install that
>> file.
>> Martin
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