EOPNOTSUPP on Pi Pico W

[oxgr]

hello! has there been any successful testing with this library on a Pi Pico W? I know ESP32 models are listed, but the Pico has native wifi module support and I still can't instantiate an OSC client.

Tried installing via circup as well as manually from main.

Using the example code, it errors at:
main.py

osc_client = microosc.OSCClient(pool, ip, port)

microosc.py

class OSCClient:
    ...
    def __init__(...):
        ...
        self._sock.setsockopt(IPPROTO_IP, IP_MULTICAST_TTL, ttl)

Error:

OSError: [Errno 95] EOPNOTSUPP

Versions:

• microosc: 0.3
• circup: 1.2.4
• pip: 21.2.4

Checked on my socket_pool and IPPROTO_IP & IP_MULTICAST_TTL match the hardcoded ones from @jepler at [ 0, 5 ] respectively. I'm guessing that the wifi chip isn't fully supported?

At a dead-end in my troubleshooting now and would appreciate hints. Any ideas on what to look for?

[todbot]

I can think of two issues:

• the multicast magic constants are different in pico-sdk compared to ESP-IDF
• multicast support isn't available yet on the Pico W.

I've only tested ESP32 and didn't think to try Pico W (had so much issue with it a year ago I gave up). I'll look into if this is a pico-sdk issue or a CircuitPython issue, see if I can get a simple multicast client/server working in pico-sdk. I know in pico-sdk multicast didn't work a year ago, but it was very new then.

[zax71]

I am currently getting this issue too on a Pico W:

Traceback (most recent call last):
  File "main.py", line 24, in <module>
  File "microosc.py", line 265, in __init__
OSError: [Errno 95] EOPNOTSUPP

The code is just the example with slight modifications: https://pastes.dev/sE5ZbZe0kN

The error occurs on line 265 that deals with multicast IPs, changing the IP to not begin with 224 fixes the issue for me

[jepler]

I entered an enhancement request over in circuitpython about this: adafruit/circuitpython#9938

until that's implemented, the setsockopt call is going to fail on those microcontrollers. I don't know what the impact is of ignoring the failure (with a try/except); or whether other limitations/differences of the socket implementation on rp2 will also affect microOSC working properly.