add examples to lint and fix warnings

examples/info_example.py

@@ -0,0 +1,23 @@
+"""Simple program to demo how to use meshtastic library.
+   To run: python examples/info.py
+"""
+
+import meshtastic
+import meshtastic.serial_interface
+
+iface = meshtastic.serial_interface.SerialInterface()
+
+# call showInfo() just to ensure values are populated
+#info = iface.showInfo()
+
+if iface.myInfo:
+    #print(f'myInfo:{iface.myInfo}')
+    print(f'firmware_version:{iface.myInfo.firmware_version}')
+
+if iface.nodes:
+    for n in iface.nodes.values():
+        if n['num'] == iface.myInfo.my_node_num:
+            print(n['user']['hwModel'])
+            break
+
+iface.close()