add examples; add Makefile

examples/pub_sub_example.py

@@ -0,0 +1,26 @@
+"""Simple program to demo how to use meshtastic library.
+   To run: python examples/pub_sub_example.py
+"""
+
+import sys
+from pubsub import pub
+
+import meshtastic
+import meshtastic.tcp_interface
+
+# simple arg check
+if len(sys.argv) < 2:
+    print(f"usage: {sys.argv[0]} host")
+    sys.exit(1)
+
+def onConnection(interface, topic=pub.AUTO_TOPIC):
+    """This is called when we (re)connect to the radio."""
+    print(interface.myInfo)
+    interface.close()
+pub.subscribe(onConnection, "meshtastic.connection.established")
+
+try:
+    iface = meshtastic.tcp_interface.TCPInterface(sys.argv[1])
+except:
+    print(f"Error: Could not connect to {sys.argv[1]}")
+    sys.exit(1)