renamed port names and added defaults

umnp/microcontroller/devices/network/udp.py

@@ -12,6 +12,8 @@ if sys.implementation.name == "micropython":
     import uasyncio as asyncio
 else:
     import asyncio
+DEFAULT_UMNP_DATA_IN_PORT = 7777
+DEFAULT_UMNP_COMMAND_IN_PORT = 7776
 
 
 class UDPReceiver:
@@ -38,11 +40,11 @@ class UDPReceiver:
 
 
 class UDPSender:
-    def __init__(self, ip, netmask, target_port: int):
+    def __init__(self, ip, netmask, send_to_port: int):
         self.socket = None
         self.ip = ip
         self.netmask = netmask
-        self._target_port = target_port
+        self._target_port = send_to_port
 
         if ip and netmask:
             self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)