diff --git a/README.md b/README.md
index 003c2be..37b26ed 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ An example using Python 3 code to send a message to the mesh:
 
 ```
 import meshtastic
-interface = meshtastic.SerialInterface() # By default will try to find a meshtastic device, otherwise provide a device path like /dev/ttyUSB0
+interface = meshtastic.serial_interface.SerialInterface() # By default will try to find a meshtastic device, otherwise provide a device path like /dev/ttyUSB0
 interface.sendText("hello mesh") # or sendData to send binary data, see documentations for other options.
 interface.close()
 ```
@@ -103,7 +103,7 @@ You can even set the channel preshared key to a particular AES128 or AES256 sequ
 meshtastic --ch-set psk 0x1a1a1a1a2b2b2b2b1a1a1a1a2b2b2b2b1a1a1a1a2b2b2b2b1a1a1a1a2b2b2b2b --info
 ```
 
-Use "--ch-set psk none" to turn off encryption.  
+Use "--ch-set psk none" to turn off encryption.
 
 Use "--ch-set psk random" will assign a new (high quality) random AES256 key to the primary channel (similar to what the Android app does when making new channels).
 
diff --git a/meshtastic/mesh_interface.py b/meshtastic/mesh_interface.py
index ce74979..844e729 100644
--- a/meshtastic/mesh_interface.py
+++ b/meshtastic/mesh_interface.py
@@ -311,7 +311,10 @@ class MeshInterface:
         elif destinationId == BROADCAST_ADDR:
             nodeNum = BROADCAST_NUM
         elif destinationId == LOCAL_ADDR:
-            nodeNum = self.myInfo.my_node_num
+            if self.myInfo:
+                nodeNum = self.myInfo.my_node_num
+            else:
+                our_exit("Warning: No myInfo found.")
         # A simple hex style nodeid - we can parse this without needing the DB
         elif destinationId.startswith("!"):
             nodeNum = int(destinationId[1:], 16)
@@ -334,7 +337,7 @@ class MeshInterface:
             meshPacket.id = self._generatePacketId()
 
         toRadio.packet.CopyFrom(meshPacket)
-        #logging.debug(f"Sending packet: {stripnl(meshPacket)}")
+        logging.debug(f"Sending packet: {stripnl(meshPacket)}")
         self._sendToRadio(toRadio)
         return meshPacket
 
@@ -374,8 +377,9 @@ class MeshInterface:
     def _waitConnected(self):
         """Block until the initial node db download is complete, or timeout
         and raise an exception"""
-        if not self.isConnected.wait(15.0):  # timeout after x seconds
-            raise Exception("Timed out waiting for connection completion")
+        if not self.noProto:
+            if not self.isConnected.wait(15.0):  # timeout after x seconds
+                raise Exception("Timed out waiting for connection completion")
 
         # If we failed while connecting, raise the connection to the client
         if self.failure:
diff --git a/meshtastic/tests/test_mesh_interface.py b/meshtastic/tests/test_mesh_interface.py
index 98a6b9a..2917c4e 100644
--- a/meshtastic/tests/test_mesh_interface.py
+++ b/meshtastic/tests/test_mesh_interface.py
@@ -9,7 +9,7 @@ import pytest
 from ..mesh_interface import MeshInterface
 from ..node import Node
 from .. import mesh_pb2
-from ..__init__ import LOCAL_ADDR
+from ..__init__ import LOCAL_ADDR, BROADCAST_ADDR
 
 
 @pytest.mark.unit
@@ -284,3 +284,62 @@ def test_sendPosition_with_a_position(caplog, reset_globals):
         assert re.search(r'p.latitude_i:408', caplog.text, re.MULTILINE)
         assert re.search(r'p.longitude_i:-11186', caplog.text, re.MULTILINE)
         assert re.search(r'p.altitude:201', caplog.text, re.MULTILINE)
+
+
+@pytest.mark.unit
+def test_sendPacket_with_no_destination(capsys, reset_globals):
+    """Test _sendPacket()"""
+    iface = MeshInterface(noProto=True)
+    with pytest.raises(SystemExit) as pytest_wrapped_e:
+        iface._sendPacket(b'', destinationId=None)
+    out, err = capsys.readouterr()
+    assert re.search(r'Warning: destinationId must not be None', out, re.MULTILINE)
+    assert err == ''
+    assert pytest_wrapped_e.type == SystemExit
+    assert pytest_wrapped_e.value.code == 1
+
+
+@pytest.mark.unit
+def test_sendPacket_with_destination_as_int(caplog, reset_globals):
+    """Test _sendPacket() with int as a destination"""
+    iface = MeshInterface(noProto=True)
+    with caplog.at_level(logging.DEBUG):
+        meshPacket = mesh_pb2.MeshPacket()
+        iface._sendPacket(meshPacket, destinationId=123)
+        assert re.search(r'Sending packet', caplog.text, re.MULTILINE)
+
+
+@pytest.mark.unit
+def test_sendPacket_with_destination_as_BROADCAST_ADDR(caplog, reset_globals):
+    """Test _sendPacket() with BROADCAST_ADDR as a destination"""
+    iface = MeshInterface(noProto=True)
+    with caplog.at_level(logging.DEBUG):
+        meshPacket = mesh_pb2.MeshPacket()
+        iface._sendPacket(meshPacket, destinationId=BROADCAST_ADDR)
+        assert re.search(r'Sending packet', caplog.text, re.MULTILINE)
+
+
+@pytest.mark.unit
+def test_sendPacket_with_destination_as_LOCAL_ADDR_no_myInfo(capsys, reset_globals):
+    """Test _sendPacket() with LOCAL_ADDR as a destination with no myInfo"""
+    iface = MeshInterface(noProto=True)
+    with pytest.raises(SystemExit) as pytest_wrapped_e:
+        meshPacket = mesh_pb2.MeshPacket()
+        iface._sendPacket(meshPacket, destinationId=LOCAL_ADDR)
+    out, err = capsys.readouterr()
+    assert re.search(r'Warning: No myInfo', out, re.MULTILINE)
+    assert err == ''
+    assert pytest_wrapped_e.type == SystemExit
+    assert pytest_wrapped_e.value.code == 1
+
+
+@pytest.mark.unit
+def test_sendPacket_with_destination_as_LOCAL_ADDR_with_myInfo(caplog, reset_globals):
+    """Test _sendPacket() with LOCAL_ADDR as a destination with myInfo"""
+    iface = MeshInterface(noProto=True)
+    myInfo = MagicMock()
+    iface.myInfo = myInfo
+    with caplog.at_level(logging.DEBUG):
+        meshPacket = mesh_pb2.MeshPacket()
+        iface._sendPacket(meshPacket, destinationId=LOCAL_ADDR)
+        assert re.search(r'Sending packet', caplog.text, re.MULTILINE)