Unable to run examples

[medakk]

Thanks for creating this library!

I'm having some trouble running the examples on Ubuntu 20.04, with kernel 5.11.0-38-generic. I paired my Joy-Con (R) via bluetooth.

$ dmesg
[   52.887339] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[   52.887344] Bluetooth: HIDP socket layer initialized
[   53.950876] hid-generic 0005:057E:2007.0007: unknown main item tag 0x0
[   53.951099] input: Joy-Con (R) as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/bluetooth/hci0/hci0:256/0005:057E:2007.0007/input/input31
[   53.951471] hid-generic 0005:057E:2007.0007: input,hidraw4: BLUETOOTH HID v0.01 Gamepad [Joy-Con (R)] on c8:21:58:8e:32:ca

If I run cat /dev/input/js0 I can see that button presses are getting sent to my computer. However, the joycon-rs examples (for example scan_for_joycons) don't seem to recognize my joycon. There is no output and I can only close it with Ctrl+C

I also tried the "Receiving reports" example on the README.md and the same behaviour occurs there. Using a debugger, its stuck on the line managed_devices.into_iter()

I've also tried using the dkms-hid-nintendo kernel module, but I still can't get the library to work.

Do you have any pointers on what else I could try/check?

EDIT: to confirm the dkms HID nintendo kernel module works, I have verified with dmesg:

[ 1841.730027] input: Nintendo Switch Right Joy-Con as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/bluetooth/hci0/hci0:256/0005:057E:2007.0009/input/input34
[ 1841.730617] input: Nintendo Switch Right Joy-Con IMU as /devices/pci0000:00/0000:00:14.0/usb1/1-8/1-8:1.0/bluetooth/hci0/hci0:256/0005:057E:2007.0009/input/input35

and two controllers(regulars controls, and IMU) show up in jstest-gtk

[medakk]

some more info: the hid_enumerate API just seems to not list the JoyCon

[KaiseiYokoyama]

I appreciate your report. @medakk 👍
Let me try reproducing the error.

But I have few experience of linux OS, it seems to be so difficult to solve this problem immidiately by myself.

[eduidl]

@KaiseiYokoyama @medakk

I succeeded in running examples on Ubuntu 20.04.
Here are the steps I took.

1. Created a file /etc/udev/rules.d/50-nintendo-switch.rules, referencing the link

# Switch Joy-con (L) (Bluetooth only)
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", KERNELS=="0005:057E:2006.*", MODE="0666"

# Switch Joy-con (R) (Bluetooth only)
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", KERNELS=="0005:057E:2007.*", MODE="0666"

# Switch Pro controller (USB and Bluetooth)
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{idVendor}=="057e", ATTRS{idProduct}=="2009", MODE="0666"
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", KERNELS=="0005:057E:2009.*", MODE="0666"

# Switch Joy-con charging grip (USB only)
KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{idVendor}=="057e", ATTRS{idProduct}=="200e", MODE="0666"

2. Applied udev rules

$ sudo udevadm control --reload-rules
$ sudo udevadm trigger

3. Changed a backend of hidapi from libusb (default) to hidraw

Cargo.toml

-hidapi = "1.3"
+hidapi = { version = "1.3", features = ["linux-static-hidraw"], default-features = false }