diff --git a/plx_gpib_ethernet/plx_gpib_ethernet.py b/plx_gpib_ethernet/plx_gpib_ethernet.py
index 669d285..9d0522c 100644
--- a/plx_gpib_ethernet/plx_gpib_ethernet.py
+++ b/plx_gpib_ethernet/plx_gpib_ethernet.py
@@ -40,6 +40,10 @@ def query(self, cmd, buffer_size=1024*1024):
         self.write(cmd)
         return self.read(buffer_size)
 
+    def query_controller(self, cmd, buffer_size=1024*1024):
+        self._send(cmd)
+        return self._recv(buffer_size)
+
     def _send(self, value):
         encoded_value = ('%s\n' % value).encode('ascii')
         self.socket.send(encoded_value)
diff --git a/tests/plx_gpib_ethernet_test.py b/tests/plx_gpib_ethernet_test.py
index 01219d2..ef7cfb4 100644
--- a/tests/plx_gpib_ethernet_test.py
+++ b/tests/plx_gpib_ethernet_test.py
@@ -140,3 +140,26 @@ def test_it_reads_gpib_query_response(plx_with_mock_socket):
     result = plx.query('*IDN?')
 
     assert result == response
+
+
+# .query_controller
+def test_it_sends_controller_query(plx_with_mock_socket):
+    plx, mock_socket = plx_with_mock_socket
+    plx.connect()
+
+    mock_socket.in_buffer.append('\n')
+    plx.query_controller('++addr')
+
+    expected_commands = ['++addr\n']
+    assert mock_socket.out_buffer[-1:] == expected_commands
+
+
+def test_it_reads_controller_query_response(plx_with_mock_socket):
+    plx, mock_socket = plx_with_mock_socket
+    plx.connect()
+
+    response = '2\n'
+    mock_socket.in_buffer.append(response)
+    result = plx.query_controller('++addr')
+
+    assert result == response