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