micropython/tests/multi_net/uasyncio_tcp_server_client.py

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# Test uasyncio TCP server and client using start_server() and open_connection()
try:
import uasyncio as asyncio
except ImportError:
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
PORT = 8000
async def handle_connection(reader, writer):
# Test that peername exists (but don't check its value, it changes)
writer.get_extra_info("peername")
data = await reader.read(100)
print("echo:", data)
writer.write(data)
await writer.drain()
print("close")
writer.close()
await writer.wait_closed()
print("done")
ev.set()
async def tcp_server():
global ev
ev = asyncio.Event()
server = await asyncio.start_server(handle_connection, "0.0.0.0", PORT)
print("server running")
multitest.next()
async with server:
await asyncio.wait_for(ev.wait(), 10)
async def tcp_client(message):
reader, writer = await asyncio.open_connection(IP, PORT)
print("write:", message)
writer.write(message)
await writer.drain()
data = await reader.read(100)
print("read:", data)
def instance0():
multitest.globals(IP=multitest.get_network_ip())
asyncio.run(tcp_server())
def instance1():
multitest.next()
asyncio.run(tcp_client(b"client data"))