If you are using debian, you can modify the file /etc/rc.local
and add this instruction:
find /sys/class/beaglebone:green:usr0/ -type f -exec chmod 777 {} \;
then restart the board. This script runs after booting.
On Thursday, September 26, 2013 10:23:11 AM UTC+2, [email protected]
wrote:
>
>
> I'm trying to run a simple led blink example like here:
>
>
> http://www.phys-x.org/rbots/index.php?option=com_content&view=article&id=104:lesson-1-beaglebone-black-blink-led&catid=46:beaglebone-black&Itemid=81
>
> I'm running a Ubuntu image on my beaglebone black with node 0.8.x. I get
> a permission problem that looks like some form of failure to have access to
> the pins. I added my user to the dialout group and that didn't work. Then
> I added my user to every group I could find and that didn't work either.
> The only way I can get the code to run and do the blinking is if I run it
> as root. My question is, how do I give my user access to whatever is
> needed to reach the pins running as non-root. The permission problem looks
> like the following:
>
> fs.js:338
> return binding.open(pathModule._makeLong(path), stringToFlags(flags),
> mode);
> ^
> Error: EACCES, permission denied
> '/sys/class/leds/beaglebone:green:usr0/trigger'
> at Object.fs.openSync (fs.js:338:18)
> at Object.fs.writeFileSync (fs.js:756:15)
> at Object.f.pinMode
> (/home/ubuntu/projects/hello_express/node_modules/bonescript/index.js:132:20)
> at Object.<anonymous>
> (/home/ubuntu/projects/hello_express/hello_express.js:31:3)
> at Module._compile (module.js:449:26)
> at Object.Module._extensions..js (module.js:467:10)
> at Module.load (module.js:356:32)
> at Function.Module._load (module.js:312:12)
> at Module.runMain (module.js:492:10)
>
> Thanks for any help in advance. I'm pretty excited to get this running.
>
> - Samuel
>
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