[Newbies] Read RasPi GPIO

Herbert König herbertkoenig at gmx.net
Wed Jan 28 12:45:27 UTC 2015


I can successfully read a GPIO Pin on the RasPi if I do it like:
dataFile ensureOpen.
value := dataFile upToEnd.
dataFile close.

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?



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