46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
#!/usr/bin/env python3
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# Send lora packet to node-red when being triggered by postgresql
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# Nico Schottelius <nico.schottelius -at- ungleich.ch>
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# 2016-11-02
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# GPLv3+
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import select
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import psycopg2
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import psycopg2.extensions
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import websocket
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channels = [ "loriot", "swisscom", "ttn" ]
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def to_nodered(provider, data):
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ws = websocket.create_connection("ws://localhost:1880/{}".format(provider))
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ws.send("%s" % data)
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ws.close()
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def wait_for_pkg(conns):
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readable, writable, exceptional = select.select(conns,[],[])
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for conn in readable:
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conn.poll()
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while conn.notifies:
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notify = conn.notifies.pop(0)
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print("Got NOTIFY: {} {} {}".format(notify.pid, notify.channel, notify.payload))
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to_nodered(notify.channel, notify.payload)
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if __name__ == '__main__':
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conns = []
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for channel in channels:
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conn = psycopg2.connect("dbname=lorawan")
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conn.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
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curs = conn.cursor()
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curs.execute("LISTEN {};".format(channel))
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conns.append(conn)
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print("Waiting for notifications on channel {}".format(channel))
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while True:
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wait_for_pkg(conns)
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