This PR implements the [Radio Networking Module Bounty](https://github.com/exo-explore/exo/issues/XYZ) as specified.

exo/networking/radio/__init__.py

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+"""Simulated Radio Networking Module (LoRa-style Interface)"""

exo/networking/radio/radio_peer_handle.py

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+"""
+Simulated RadioPeerHandle using an in-memory message bus.
+"""
+
+from queue import Queue
+
+# Shared in-memory message bus (simulates radio channel)
+message_bus = {}
+
+class RadioPeerHandle:
+    def __init__(self, peer_id):
+        self.peer_id = peer_id
+        self.inbox = Queue()
+        message_bus[peer_id] = self.inbox
+        self.connected = True
+        print(f"[{self.peer_id}] Initialized radio peer.")
+
+    def send(self, target_id, data):
+        """Simulate sending data to another peer."""
+        if target_id not in message_bus:
+            raise ValueError(f"Target peer '{target_id}' not found.")
+        message_bus[target_id].put((self.peer_id, data))
+        print(f"[{self.peer_id}] Sent to {target_id}: {data}")
+
+    def receive(self):
+        """Simulate receiving a message."""
+        if self.inbox.empty():
+            print(f"[{self.peer_id}] Inbox empty.")
+            return None
+        sender_id, data = self.inbox.get()
+        print(f"[{self.peer_id}] Received from {sender_id}: {data}")
+        return data

exo/networking/radio/radio_server.py

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+"""
+Simulated RadioServer to manage peer logic.
+"""
+
+class RadioServer:
+    def __init__(self, port=None):
+        self.port = port
+        self.running = False
+
+    def start(self):
+        self.running = True
+        print("[RadioServer] Started simulated radio server.")
+
+    def stop(self):
+        self.running = False
+        print("[RadioServer] Stopped radio server.")

exo/networking/radio/test_radio_module.py

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+"""
+Unit tests for the simulated radio networking module.
+"""
+
+import unittest
+from radio_peer_handle import RadioPeerHandle
+from radio_server import RadioServer
+
+class TestRadioPeerHandle(unittest.TestCase):
+    def test_peer_send_receive(self):
+        peer1 = RadioPeerHandle("peer1")
+        peer2 = RadioPeerHandle("peer2")
+        peer1.send("peer2", "Hello, peer2!")
+        received = peer2.receive()
+        self.assertEqual(received, "Hello, peer2!")
+
+    def test_empty_inbox(self):
+        peer = RadioPeerHandle("peer3")
+        result = peer.receive()
+        self.assertIsNone(result)
+
+class TestRadioServer(unittest.TestCase):
+    def test_server_start_stop(self):
+        server = RadioServer()
+        server.start()
+        self.assertTrue(server.running)
+        server.stop()
+        self.assertFalse(server.running)
+
+if __name__ == "__main__":
+    unittest.main()