kopia lustrzana https://github.com/peterhinch/micropython-samples
65 wiersze
2.1 KiB
Python
65 wiersze
2.1 KiB
Python
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# application.py
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# Released under the MIT licence.
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# Copyright (C) Peter Hinch 2018
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# The App class emulates a user application intended to service a single
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# client. In this case we have four instances of the application servicing
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# clients with ID's 1-4.
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import uasyncio as asyncio
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loop = asyncio.get_event_loop(runq_len=32, waitq_len=32)
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import ujson
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import server
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class App():
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def __init__(self, client_id):
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self.client_id = client_id
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self.data = [0, 0] # Exchange a 2-list with remote
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loop = asyncio.get_event_loop()
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loop.create_task(self.start(loop))
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async def start(self, loop):
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print('Client {} Awaiting connection.'.format(self.client_id))
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conn = None
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while conn is None:
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await asyncio.sleep_ms(100)
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conn = server.client_conn(self.client_id)
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loop.create_task(self.reader(conn))
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loop.create_task(self.writer(conn))
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async def reader(self, conn):
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print('Started reader')
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while True:
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# Attempt to read data: server times out if none arrives in timeout
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# period closing the Connection. .readline() pauses until the
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# connection is re-established.
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line = await conn.readline()
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self.data = ujson.loads(line)
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# Receives [restart count, uptime in secs]
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print('Got', self.data, 'from remote', self.client_id)
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# Send [approx application uptime in secs, received client uptime]
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async def writer(self, conn):
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print('Started writer')
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count = 0
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while True:
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self.data[0] = count
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count += 1
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print('Sent', self.data, 'to remote', self.client_id)
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print()
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# .write() behaves as per .readline()
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await conn.write('{}\n'.format(ujson.dumps(self.data)))
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await asyncio.sleep(5)
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clients = [App(n) for n in range(1, 5)] # Accept 4 clients with ID's 1-4
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try:
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loop.run_until_complete(server.run(timeout=1500))
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except KeyboardInterrupt:
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print('Interrupted')
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finally:
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print('Closing sockets')
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for s in server.socks:
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s.close()
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