Begin to implement notify via postgresql

notify.py

@@ -0,0 +1,19 @@
+import select
+import psycopg2
+import psycopg2.extensions
+
+conn = psycopg2.connect("dbname=lorawan")
+conn.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
+
+curs = conn.cursor()
+curs.execute("LISTEN test;")
+
+print("Waiting for notifications on channel test")
+while True:
+    if select.select([conn],[],[]) == ([],[],[]):
+        print("Timeout")
+    else:
+        conn.poll()
+        while conn.notifies:
+            notify = conn.notifies.pop(0)
+            print("Got NOTIFY: {} {} {}".format(notify.pid, notify.channel, notify.payload))

receiver/ttn-receiver.py

@@ -4,6 +4,9 @@
 # www.schimmel-bisolutions.nl
 # first install paho.mqtt.client: pip install paho-mqtt
 #
+# Enhanced for lorawan in Digital Glarus by Nico Schottelius (nico.schottelius -at- ungleich.ch)
+#
+
 import paho.mqtt.client as mqtt
 import psycopg2
 import json
@@ -38,6 +41,10 @@ def insert_json(provider, data, payload='', deveui=''):
         cursor = conn.cursor()
         cursor.execute("insert into packets values (DEFAULT, DEFAULT, %s, %s, %s, %s)",  (provider, data, payload, deveui))
         cursor.connection.commit()
+
+        notify="{}/{}".format(deveui, payload)
+        cursor.execute("select pg_notify ('lora', %s)",  (notify))
+        cursor.connection.commit()
         conn.close()
     except Exception as e:
         print("DB Insert failed: %s" % e)