[Newbies] Read RasPi GPIO

[Herbert König]

Wonderful,
dataFile reset.
^dataFile upToEnd

I thought every read request would just produce a new value.

Thanks,

Herbert

does the trick
Am 28.01.2015 um 14:13 schrieb Michael Rice:
> Is there a StandardFileStream>>reset?
>
> Michael
>
> On Wed, Jan 28, 2015 at 7:45 AM, Herbert König <herbertkoenig at gmx.net 
> <mailto:herbertkoenig at gmx.net>> wrote:
>
>     Hi,
>
>     I can successfully read a GPIO Pin on the RasPi if I do it like:
>     |value|
>     dataFile ensureOpen.
>     value := dataFile upToEnd.
>     dataFile close.
>     ^value
>
>     dataFile is the /sys/class/gpio/gpioxx/value file that exists
>     after exporting gpioxx.
>
>     Without the reopening and closing of the file I get '' on
>     subsequent reads which means that
>     StandartFileStream>>basicNext answers nil.
>
>     Is there a way to get the values without having to close and
>     reopen the file each time?
>
>     Thanks
>
>     Herbert
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