asyncio.start_server relies on usocket, which is not available for circuitpython

[robogame-dev]

asyncio.start_server does not start because there is no usocket.

If anyone has a workaround for running a TCP server without polling or blocking please lmk - in the meantime it's possible to poll a non-blocking TCP socket with socketpool, but obviously without the benefits of asyncio for performance.

Minimal reproduction code - be sure to update with your specific WiFi info below:

import asyncio
import wifi


wificreds = ["your_ssidname", "your_password"]

while wifi.radio.ipv4_address is None:
    found_networks = wifi.radio.start_scanning_networks()
    for network in found_networks:
        if network.ssid == wificreds[0]:
            wifi.radio.stop_scanning_networks()
            wifi.radio.connect(*wificreds)
    if wifi.radio.ipv4_address is not None:
        break
print("connected to wifi")


async def run_server():
    await asyncio.start_server(connection_callback, wifi.radio.ipv4_address, 8747)


def connection_callback(reader: asyncio.StreamReader, writer: asyncio.StreamWriter):
    print("incoming connection")


asyncio.run(run_server())

The output of running that code on the latest CircuitPython 8:

code.py output:
connected to wifi
Traceback (most recent call last):
File "code.py", line 26, in
File "asyncio/core.py", line 312, in run
File "asyncio/core.py", line 271, in run_until_complete
File "asyncio/core.py", line 256, in run_until_complete
File "code.py", line 19, in run_server
File "asyncio/stream.py", line 231, in start_server
ImportError: no module named 'usocket'

Code done running.

[imnotjames]

I think this is a duplicate of #35