diff --git a/interface1/firmware/src/main.cpp b/interface1/firmware/src/main.cpp
index c790ea4..d1d2375 100644
--- a/interface1/firmware/src/main.cpp
+++ b/interface1/firmware/src/main.cpp
@@ -79,8 +79,6 @@ void sendErrorMessage(uint8_t code, const char *description)
 }
 
 #define COMMAND_RESET 0x01
-#define COMMAND_TRANSMIT 0x02
-#define COMMAND_RECEIVE 0x04
 #define COMMAND_TRANSMIT_RECEIVE 0x06
 
 void handleResetCommand(uint8_t *buffer, int bufferCount)
diff --git a/pycoax/coax/interface.py b/pycoax/coax/interface.py
index 77ad984..9f8f3c7 100644
--- a/pycoax/coax/interface.py
+++ b/pycoax/coax/interface.py
@@ -7,12 +7,6 @@ class Interface:
     def reset(self):
         raise NotImplementedError
 
-    def transmit(self, words, repeat_count=None, repeat_offset=1):
-        raise NotImplementedError
-
-    def receive(self, length=None, timeout=None):
-        raise NotImplementedError
-
     def transmit_receive(self, transmit_words, transmit_repeat_count=None,
                          transmit_repeat_offset=1, receive_length=None,
                          receive_timeout=None):
diff --git a/pycoax/coax/serial_interface.py b/pycoax/coax/serial_interface.py
index 5c6f4e4..6fe7c66 100644
--- a/pycoax/coax/serial_interface.py
+++ b/pycoax/coax/serial_interface.py
@@ -45,35 +45,6 @@ class SerialInterface(Interface):
 
         return '{}.{}.{}'.format(major, minor, patch)
 
-    def transmit(self, words, repeat_count=None, repeat_offset=1):
-        message = bytes([0x02])
-
-        message += _pack_transmit_header(repeat_count, repeat_offset)
-        message += _pack_transmit_data(words)
-
-        self._write_message(message)
-
-        message = self._read_message()
-
-        if message[0] != 0x01:
-            raise _convert_error(message)
-
-    def receive(self, length=None, timeout=None):
-        timeout_milliseconds = self._calculate_timeout_milliseconds(timeout)
-
-        message = bytes([0x04])
-
-        message += _pack_receive_header(length, timeout_milliseconds)
-
-        self._write_message(message)
-
-        message = self._read_message()
-
-        if message[0] != 0x01:
-            raise _convert_error(message)
-
-        return _unpack_receive_data(message[1:])
-
     def transmit_receive(self, transmit_words, transmit_repeat_count=None,
                          transmit_repeat_offset=1, receive_length=None,
                          receive_timeout=None):