Linux Support

[riley-spires]

I have been able to get this to work on linux (Fedora 41)for the most part

I have been able to do this by changing

let displayPath = connectedDisplaypads.filter((device) => {
return device.interface==1
})[0].path

to

let displayPath = connectedDisplaypads.filter((device) => {
return device.interface==0
})[0].path

However, I cannot change any of the displays because it fails to write to the rawhid. Below are my available devices by Mountain in a table

┌─────────┬──────────┬───────────┬────────────────┬──────────────┬──────────────┬───────────────────────┬─────────┬───────────┬───────────┬───────┐
│ (index) │ vendorId │ productId │ path           │ serialNumber │ manufacturer │ product               │ release │ interface │ usagePage │ usage │
├─────────┼──────────┼───────────┼────────────────┼──────────────┼──────────────┼───────────────────────┼─────────┼───────────┼───────────┼───────┤
│ 0       │ 12930    │ 9         │ '/dev/hidraw0' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 0         │ 1         │ 6     │
│ 1       │ 12930    │ 9         │ '/dev/hidraw0' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 0         │ 12        │ 1     │
│ 2       │ 12930    │ 9         │ '/dev/hidraw0' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 0         │ 1         │ 128   │
│ 3       │ 12930    │ 9         │ '/dev/hidraw0' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 0         │ 1         │ 2     │
│ 4       │ 12930    │ 9         │ '/dev/hidraw0' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 0         │ 1         │ 1     │
│ 5       │ 12930    │ 9         │ '/dev/hidraw1' │ ''           │ 'Mountain'   │ 'MOUNTAIN DisplayPad' │ 7       │ 3         │ 65280     │ 1     │
└─────────┴──────────┴───────────┴────────────────┴──────────────┴──────────────┴───────────────────────┴─────────┴───────────┴───────────┴───────┘

And below here is a stack trace of the error whenever I try to use pad.fillColor(0, 255, 0, 0)

node:events:496
     throw er; // Unhandled 'error' event
     ^

TypeError: Cannot write to hid device
   at Displaypad._processDataEvent (/mnt/MassStorage/CodeLibrary/JavaScript/mountain-test/node_modules/mountain-displaypad/index.js:283:26)
   at HID.<anonymous> (/mnt/MassStorage/CodeLibrary/JavaScript/mountain-test/node_modules/mountain-displaypad/index.js:137:9)
   at HID.emit (node:events:518:28)
   at readFunc (/mnt/MassStorage/CodeLibrary/JavaScript/mountain-test/node_modules/node-hid/nodehid.js:117:26)
Emitted 'error' event on Displaypad instance at:
   at HID.<anonymous> (/mnt/MassStorage/CodeLibrary/JavaScript/mountain-test/node_modules/mountain-displaypad/index.js:141:9)
   at HID.emit (node:events:518:28)
   at Immediate.<anonymous> (/mnt/MassStorage/CodeLibrary/JavaScript/mountain-test/node_modules/node-hid/nodehid.js:122:26)
   at process.processImmediate (node:internal/timers:491:21)

Node.js v22.11.0

I will be more than willing to test possible solutions or brainstorm with others. This is the only way I've gotten this specific device to work on linux so far.

[riley-spires]

Just a note for the first part of this issue, I have no HID devices from Mountain with interface 1. I have 5 devices showing from node-hid with interface 0 and 1 device showing with interface 3.