unable to get joycon status

[bldintheplacetobe]

Hi,

This is probably a basic question, but I'm struggling to get status from my joycon. I have a joycon (purple) connected to a pi with bluetooth. It shows connected in the pi gui, however the joycon's flashing lights continue to flash from left to right continuously

When I run the basic commands listed to get status, I'm getting an invalid vendor error as follows:

from pyjoycon import JoyCon, get_R_id
joycon_id = get_R_id()
joycon = JoyCon(*joycon_id)
Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python3.7/dist-packages/pyjoycon/joycon.py", line 25, in init
raise ValueError(f'vendor_id is invalid: {vendor_id!r}')
ValueError: vendor_id is invalid: None

What have I missed?

Thanks!

[pbsds]

The lights won't change until you instruct them to change.

What is the output of get_R_id() ? Have you tried get_L_id? If none of them return any devices, ensure you can see the joycon with a separate tool such as lshid. you may need to run as root to access hid devices.

[gdcgunther4]

I have the same problem on the same setup (just knockoff joycons). I ran the status program with sudo, but I got the same message. I tried using lshid, and it showed up, but I get the same error message. I made the udev rules like the readme said. Do I need to change the rules?

Thanks

[krzysztofkrzeslak]

In case someone will experience the same problem I have some tips as I also struggled a long time to make it work.

1. use hid instead of hidapi:
   pip3 install hid
2. use udev rules from here
3. not sure if this if required but I also added such line to udev rules
   KERNEL=="js0", SUBSYSTEM=="input", MODE="0666"
4. (!) Most important I think, hid library is using system libhidapi-hidraw0 and you can encounter message like no such symbol get_hid_report() or something like that, so you're probably using ubuntu 18.04 where default version of this lib is actually not containing this function, so to fix that:
   sudo apt remove libhidapi-hidraw0
wget http://archive.ubuntu.com/ubuntu/pool/universe/h/hidapi/libhidapi-hidraw0_0.10.1+dfsg-1_amd64.deb
sudo dpkg -i libhidapi-hidraw0_0.10.1+dfsg-1_amd64.deb