Board - Githubissues

aronvandervalk commented 2 years ago

Hi!

I'm trying to get my Pi fired up with the node-pixel library, together with I2C backpack. I installed the packages and try to run this simple code:

var five = require("johnny-five");
var pixel = require("node-pixel");

var opts = {};
opts.port = process.argv[2] || "";

console.dir(process.argv[2]);

var board = new five.Board(opts);
var strip = null;

var fps = 20; // how many frames per second do you want to try?

board.on("ready", function() {
    console.log("Board ready, lets add light");
});

But I keep getting the result after running this code: 1642108712270 Board Looking for connected device 1642108720067 Board No connected device found

It seems it cannot find "node" as the board?

Also, when I try to log process.argv[2] I get an undefined, as it does not exists.

ajfisher commented 2 years ago

process.argv[2] here is an explicit path to the board in question.

This script that you're using here isn't really how you'd run this because you're not running a firmata based board, you're using an I2C backpack.

As a result, you want to use Raspi-io to provide the board interface to johnny five and then you should be good to go from there.

Have at this example for a simple LED Blink and the basic structure for the set up: http://johnny-five.io/examples/raspi-io/

Assuming that works, then just replace the board.ready event with the node pixel stuff and you should get some coloured LEDs.

On Fri, 14 Jan 2022 at 08:21, aronvandervalk @.***> wrote:

Hi!

I'm trying to get my Pi fired up with the node-pixel library, together with I2C backpack. I installed the packages and try to run this simple code:

`var five = require("johnny-five"); var pixel = require("node-pixel");

var opts = {}; opts.port = process.argv[2] || "";

console.dir(process.argv[2]);

var board = new five.Board(opts); var strip = null;

var fps = 20; // how many frames per second do you want to try?

board.on("ready", function() {

console.log("Board ready, lets add light");

});`

But I keep getting the result after running this code: 1642108712270 Board Looking for connected device 1642108720067 Board No connected device found

It seems it cannot find "node" as the board?

Also, when I try to log process.argv[2] I get an undefined, as it does not exists.

— Reply to this email directly, view it on GitHub https://github.com/ajfisher/node-pixel/issues/285, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAA5DI4UNQ26CF5EJQYJWTLUV465VANCNFSM5L47HQPQ . You are receiving this because you are subscribed to this thread.Message ID: @.***>

aronvandervalk commented 2 years ago

Thanks for your answer! After installing the packages I tried running the code:

var five = require("johnny-five");
var Raspi = require("raspi-io").RaspiIO;
var board = new five.Board({
  io: new Raspi()
});

board.on("ready", function() {

    console.log("Board ready, lets add light");
});

Which keeps running into this error. Even after rebooting.

pi@raspberrypi:~/node-pixel-test $ node index.js
internal/fs/utils.js:269
    throw err;
    ^

Error: EACCES: permission denied, open '/sys/class/leds/led0/trigger'
    at Object.openSync (fs.js:462:3)
    at Object.writeFileSync (fs.js:1384:35)
    at new LED (/home/pi/node-pixel-test/node_modules/raspi-led/dist/index.js:37:18)
    at Object.createLED (/home/pi/node-pixel-test/node_modules/raspi-led/dist/index.js:62:16)
    at new LEDManager (/home/pi/node-pixel-test/node_modules/j5-io/dist/managers/led.js:32:30)
    at new J5IO (/home/pi/node-pixel-test/node_modules/j5-io/dist/index.js:116:32)
    at new RaspiIO (/home/pi/node-pixel-test/node_modules/raspi-io/dist/index.js:122:12)
    at Object.<anonymous> (/home/pi/node-pixel-test/index.js:5:7)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10) {
  errno: -13,
  syscall: 'open',
  code: 'EACCES',
  path: '/sys/class/leds/led0/trigger'
}

Do you have an idea what could cause this?

ajfisher commented 2 years ago

Okay this is most likely a permissions issue of the user running the script versus permissions available on the device.

You can check if this is the case by simply running your script as a super user - ie sudo node script.js

If that resolves it then I think there's a way you can solve this by adding your user to a specific group but I"m not sure off the top of my head which one. dialout is what you usually use for serial USB devices but not sure if that will work for I2C bus. There may be some more info on the raspi-io repo. I'm on phone at the moment so will have a look when I get back to my laptop and can dig around a bit more.

On Fri, 14 Jan 2022 at 10:11, aronvandervalk @.***> wrote:

Thanks for your answer! After installing the packages I tried running the code:

var five = require("johnny-five"); var Raspi = require("raspi-io").RaspiIO; var board = new five.Board({ io: new Raspi() });

board.on("ready", function() {
console.log("Board ready, lets add light");
});

Which keeps running into this error. Even after rebooting.

@.***:~/node-pixel-test $ node index.js internal/fs/utils.js:269 throw err; ^

Error: EACCES: permission denied, open '/sys/class/leds/led0/trigger' at Object.openSync (fs.js:462:3) at Object.writeFileSync (fs.js:1384:35) at new LED (/home/pi/node-pixel-test/node_modules/raspi-led/dist/index.js:37:18) at Object.createLED (/home/pi/node-pixel-test/node_modules/raspi-led/dist/index.js:62:16) at new LEDManager (/home/pi/node-pixel-test/node_modules/j5-io/dist/managers/led.js:32:30) at new J5IO (/home/pi/node-pixel-test/node_modules/j5-io/dist/index.js:116:32) at new RaspiIO (/home/pi/node-pixel-test/node_modules/raspi-io/dist/index.js:122:12) at Object. (/home/pi/node-pixel-test/index.js:5:7) at Module._compile (internal/modules/cjs/loader.js:999:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10) { errno: -13, syscall: 'open', code: 'EACCES', path: '/sys/class/leds/led0/trigger' }

Do you have an idea what could cause this?

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aronvandervalk commented 2 years ago

Thanks for your answer. The sudo node index.js did the trick!

Thanks for helping me out! I appreciate it very, very much. Now I can start tinkering with your library and implementing some light installation ideas. Nice :-)

ajfisher commented 2 years ago

Glad to hear that worked ok.

Please share when you do - love seeing what people come up with.

On Sun, 16 Jan 2022, 00:59 aronvandervalk, @.***> wrote:

Thanks for your answer. The sudo node index.js did the trick!

Thanks for helping me out! I appreciate it very, very much. Now I can start tinkering with your library and implementing some light installation ideas. Nice :-)

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ajfisher / node-pixel

Board #285