Pi 5 Compatibility issues about onoff HOT 9 CLOSED

onoff uses the GPIO sysfs interface for userspace GPIO. This interface has been deprecated for quite some time (see here). I don't know if the GPIO sysfs Interface for userspace GPIO is supported on the Raspberry Pi 5 so I asked here on the Raspberry Pi forum.

from onoff.

Never mind, I thought the new gpio numbers were now the pin numbers, but they are the 4xx range!

Hi @rhysmorgan134 , what you did to be able to use onoff with the raspberry pi 5?

I have this simple code:

const Gpio =  require("onoff").Gpio;
const led = new Gpio(4, "out");

led.writeSync(1);

And I get a error message saying:
Error: EINVAL: invalid argument, write

from onoff.

@rodsnts To understand how GPIO numbering works on the Pi5, it's important to read this post: https://forums.raspberrypi.com/viewtopic.php?t=359302

Assuming you want to use GPIO4, which is PIN7 on the GPIO header, then you'll need to replace this:

const Gpio =  require("onoff").Gpio;
const led = new Gpio(4, "out");

led.writeSync(1);

with this:

const Gpio =  require("onoff").Gpio;
const led = new Gpio(403, "out");

led.writeSync(1);

In other words, what used to be GPIO4 is now GPIO403 on the Pi5. Give this a try to see if it works.

from onoff.

@rhysmorgan134 Please take a look at the forum post. I need to do some more testing but everything appears to be working, including interrupt detection. However, the GPIO numbering is completely different.

from onoff.

Thanks alot @fivdi just ran some tests now, and after upgrading I appear to now be getting these errors, I will have an investigate!

node:internal/fs/utils:350
    throw err;
    ^

Error: EINVAL: invalid argument, write
    at Object.writeSync (node:fs:936:3)
    at Object.writeFileSync (node:fs:2330:26)
    at exportGpio (/home/pi/SocketMost/node_modules/onoff/onoff.js:18:8)
    at new Gpio (/home/pi/SocketMost/node_modules/onoff/onoff.js:172:36)
    at new OS8104A (/home/pi/SocketMost/dist/driver/OS8104A.js:46:26)
    at new SocketMost (/home/pi/SocketMost/dist/server/SocketMost.js:107:23)
    at Object.<anonymous> (/home/pi/SocketMost/examples/server.js:3:20)
    at Module._compile (node:internal/modules/cjs/loader:1256:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
    at Module.load (node:internal/modules/cjs/loader:1119:32) {
  errno: -22,
  syscall: 'write',
  code: 'EINVAL'
}

Node.js v18.18.2

from onoff.

Never mind, I thought the new gpio numbers were now the pin numbers, but they are the 4xx range!

from onoff.

As an extra spi-device works out of the box, great stuff, and thanks for the help and the libraries!

from onoff.

@rhysmorgan134 Thanks for confirming that both onoff and spi-device are now working for you.

from onoff.

@fivdi Worked!! Please marry me.

from onoff.