Wiimote support via bluetooth

[okyeron]

This came up in a conversation today so I started poking around and now I'm looking for a little help

RasPI 3b has Bluetooth built-in. Norns hardware could have BT with a USB dongle. I'm thinking it should be possible to get the wiimote working as a HID device.

I've got my wiimote connected to raspi-norns and I'm not sure where to go next to get HID data. Looks like some mods will be needed?

after connecting the wiimote dmesg shows me:

[   60.521044] Bluetooth: HIDP socket layer initialized
[   60.714181] wiimote 0005:057E:0306.0003: unknown main item tag 0x0
[   60.714812] wiimote 0005:057E:0306.0003: hidraw2: BLUETOOTH HID v6.00 Gamepad [Nintendo RVL-CNT-01] on b8:27:eb:63:4d:4b
[   60.714872] wiimote 0005:057E:0306.0003: New device registered
[   60.760104] wiimote 0005:057E:0306.0003: detected device: Nintendo Wii Remote (Gen 1)
[   60.760948] input: Nintendo Wii Remote Accelerometer as /devices/platform/soc/3f201000.serial/tty/ttyAMA0/hci0/hci0:12/0005:057E:0306.0003/input/input7
[   60.761331] input: Nintendo Wii Remote IR as /devices/platform/soc/3f201000.serial/tty/ttyAMA0/hci0/hci0:12/0005:057E:0306.0003/input/input8
[   60.761677] input: Nintendo Wii Remote as /devices/platform/soc/3f201000.serial/tty/ttyAMA0/hci0/hci0:12/0005:057E:0306.0003/input/input6

Best I can sort out here is that the wiimote is showing up as a serial/tty device and not an input/event that norns device_monitor would see as an HID device.

Any suggestions on how I might get this to show up as HID?

do I need some kind of udev rule?

[okyeron]

Ok - further checking - I AM getting the wiimote to show up as /dev/input/event* devices, but now I realize that device_monitor.c is ONLY looking at the usb subsystem, so it won't work without some more hacking

Thus we would need to extend device_monitor to add the bluetooth subsystem?

[komicone]

Beyond the Wiimote use, supporting keyboard input via bluetooth would allow input to ORCA and any other text based scripts that get developed and fewer cables is always nice :)

[okyeron]

pinging to @catfact to see if there's any suggestions here.

I tried to extend device_monitor.c to look alternately look at bluetooth adding the following

else if (udev_device_get_parent_with_subsystem_devtype(dev, "bluetooth", NULL)) {
                    handle_device(dev);
                }

and again around line 250

but it pretty much crashed matron everytime and I got kinda stumped.

[catfact]

you can certainly try bypassing the usb test as in this PR:
https://github.com/monome/norns/pull/532/files

in my view the closure of this PR was abortive; i have questions and issues with it but would be pleased to hear constructive feedback. i think it will mean we'll get a bunch of events from subsystems that we don't actually know how to work with in lua; that's OK but probably needs more work