add examples; add Makefile

examples/hello_world_serial.py

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+"""Simple program to demo how to use meshtastic library.
+   To run: python examples/hello_world_serial.py
+"""
+
+import sys
+import meshtastic
+import meshtastic.serial_interface
+
+# simple arg check
+if len(sys.argv) < 2:
+    print(f"usage: {sys.argv[0]} message")
+    sys.exit(3)
+
+# By default will try to find a meshtastic device,
+# otherwise provide a device path like /dev/ttyUSB0
+iface = meshtastic.serial_interface.SerialInterface()
+iface.sendText(sys.argv[1])
+iface.close()

examples/pub_sub_example.py

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+"""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)

examples/pub_sub_example2.py

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+"""Simple program to demo how to use meshtastic library.
+   To run: python examples/pub_sub_example2.py
+"""
+
+import sys
+import time
+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 onReceive(packet, interface):
+    """called when a packet arrives"""
+    print(f"Received: {packet}")
+
+def onConnection(interface, topic=pub.AUTO_TOPIC):
+    """called when we (re)connect to the radio"""
+    # defaults to broadcast, specify a destination ID if you wish
+    interface.sendText("hello mesh")
+
+pub.subscribe(onReceive, "meshtastic.receive")
+pub.subscribe(onConnection, "meshtastic.connection.established")
+try:
+    iface = meshtastic.tcp_interface.TCPInterface(hostname=sys.argv[1])
+    while True:
+        time.sleep(1000)
+    iface.close()
+except(Exception) as ex:
+    print(f"Error: Could not connect to {sys.argv[1]} {ex}")
+    sys.exit(1)