I made a node server, using pi + node + express + pi-gpio . And I also use FOREVER to run the server forever.
It work well when I run it as "node app.js" or "forever start app.js". The pi-gpio can work conrectly and GPIO can work too.

but , if I add the FOREVER command to a /etc/init.d/ service, for example, /etc/init.d/nodepi, it won't work well. It said "GPIO admin can't find".

the /etc/init.d/nodepi's content like this:
forever start node app.js

After running the /etc/init.d/nodepi, the webserver has started and I can visit it. But the GPIO of PI couldn't work.

Weirdly, If I run another command after this, "PORT=1234 node app.js" , I can visit the website by PORT 1234. And then, The GPIO works!. When I return to visit PORT 3000 website (the app.js default port) I can control the GPIO. It's working!

I think there might be some problem on user's rights.
All those operations are ran by root.

I'm using 2015-05-05-raspbian-wheezy on a Raspberry Pi 2 and when I run gpio-admin, I get the following error: "gpio-admin: failed to change group ownership of /sys/devices/virtual/gpio/gpio22/direction: No such file or directory". Does the program have to use the "/sys/devices/virtual/gpio..." folders or can it use the "sys/class/gpio..." folders?

Hi guys, I installed the HAP-NodeJS and I am using the Light_accessory.js to control a light. I Also installed pi-gpio and when the server is running I see that the stace changes from 0-1 and vise versa. The lights does not turn on/off. Do you have any ideas?

The group 'gpio' is a pre-existing group in current versions of raspbian, and the 'pi' user belongs to that group. When 'make uninstall' removes that group it leaves the 'pi' user as part of an undefined group.

I get this error
Error when trying to open pin 11
gpio-admin: could not flush data to /sys/class/gpio/export: Device or resource busy
Raspberry pi 3b+
config.json:
`
{
"bridge": {
"name": "Homebridge3",
"username": "DC:22:3D:E3:CE:30",
"port": 4000,
"pin": "333-33-333"
},

"description": "This is an example configuration file with one fake accessory and one fake platform. You can use this as a template for creating your own configuration file containing devices you actually own.",
"ports": {
  "start": 52100,
  "end": 52150,
  "comment": "This section is used to control the range of ports that separate accessory (like camera or television) should be bind to."
},
"accessories": [
  {
    "accessory": "relay",
    "name": "Relay 1",
    "pin" : 11,
    "duration" : 0
  },
  {
    "accessory": "relay",
    "name": "Relay 2",
    "pin" : 12,
    "duration" : 0
  }
],

  
    "platform": "CameraUI",
    "videoProcessor": "ffmpeg",
    "cameras": [
      {
        "name": "Flur",
        "active": true,
        "videoConfig": {
          "source": "-f v4l2 -r 30 -s 1280x720 -i /dev/video0",
          "maxWidth": 1920,
          "maxHeight": 1080,
          "maxFPS": 30
        }
      }
    ]

}`

after install I can't find folder gpio in /sys/devices/virtual/

NOTE
Pins are identified by their SOC poin numbers, not the header pin numbers.

Should be:

NOTE
Pins are identified by their SOC pin numbers, not the header pin numbers.

I created a server using nodejs and i created a scheduler that turns on pins at different times. Most of the time it works but from time to time i get "Error: EACCES: permission denied, open '/sys/class/gpio/gpio4/direction'"