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Anyone know how to access RasPi GPIO without sudo?

johnbeetem

I've finally gotten around to playing with RasPi GPIOs, using Gert van Loo and Dom's C code at the RasPi Wiki.  It works fine, except that you have to run the executable as root or use sudo to access /dev/mem.

 

Does anyone here know how to access /dev/mem as a normal user?

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    Greeting John

     

    I use wiringPi and have written a small daemon framework that I will finish once I sort out hardware/logic requirements.

    This sort of set up allows user space programs to talk to the daemon although I am not doing this at present.

    My application needs a push button and a tamper switch plus relay outputs (4 at first).

    Camera plus streaming audio. Motion & avconv. Signally to end points. Control of relays from EP.

    Logic to deal with a gate opener and general security at a distant gate (150m for my proof of concept).

    Push button at camera. Plays sound, cyborg voice, turns on relay (light at cam), signals end point RPi.

    End point at home TV. View, send audio to, and push button or web interface to open gate.

    The perfect application for the RPi and allows further system integration with other systems.

     

    Eventually I want to hook MC9S08 and STM32V modules to the RPi all of which I have and am reasonably competent with.

    As for Linux. I am an early implimenter starting in the days when it took days to get the bits to get a 386 going.

    By no means a ubber geek I am entirely self taught and work on a need to know basis.

     

    Always looking for people wishing to join in and can provide a private vehicle for a small development group on my hobby web site zlham.geek.nz.

    Sorry I do not accept freemail addresses unless I know who wants an account in which case it is best to email me before applying.

     

    If the OP is interested in code I can put it up on my ftp site with the caviate that it is not fit for public release as such and will be taken down again in a week or so.

     

    Regards

    Peter

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  • 0

    Greeting John

     

    I use wiringPi and have written a small daemon framework that I will finish once I sort out hardware/logic requirements.

    This sort of set up allows user space programs to talk to the daemon although I am not doing this at present.

    My application needs a push button and a tamper switch plus relay outputs (4 at first).

    Camera plus streaming audio. Motion & avconv. Signally to end points. Control of relays from EP.

    Logic to deal with a gate opener and general security at a distant gate (150m for my proof of concept).

    Push button at camera. Plays sound, cyborg voice, turns on relay (light at cam), signals end point RPi.

    End point at home TV. View, send audio to, and push button or web interface to open gate.

    The perfect application for the RPi and allows further system integration with other systems.

     

    Eventually I want to hook MC9S08 and STM32V modules to the RPi all of which I have and am reasonably competent with.

    As for Linux. I am an early implimenter starting in the days when it took days to get the bits to get a 386 going.

    By no means a ubber geek I am entirely self taught and work on a need to know basis.

     

    Always looking for people wishing to join in and can provide a private vehicle for a small development group on my hobby web site zlham.geek.nz.

    Sorry I do not accept freemail addresses unless I know who wants an account in which case it is best to email me before applying.

     

    If the OP is interested in code I can put it up on my ftp site with the caviate that it is not fit for public release as such and will be taken down again in a week or so.

     

    Regards

    Peter

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