diff --git a/radio/src/pulses/afhds2.cpp b/radio/src/pulses/afhds2.cpp
index 33da97405..79aad0b0e 100644
--- a/radio/src/pulses/afhds2.cpp
+++ b/radio/src/pulses/afhds2.cpp
@@ -20,6 +20,8 @@
  */
 
 #include "afhds2.h"
+#include "flysky.h"
+#include "intmodule_serial_driver.h"
 
 etx_serial_init afhds2SerialInitParams = {
     .baudrate = INTMODULE_USART_AFHDS2_BAUDRATE,
diff --git a/radio/src/pulses/afhds2.h b/radio/src/pulses/afhds2.h
index 2b4ef2941..cbfe929f6 100644
--- a/radio/src/pulses/afhds2.h
+++ b/radio/src/pulses/afhds2.h
@@ -27,6 +27,8 @@
 #include <map>
 #include <list>
 
+#include "hal/serial_driver.h"
+
 #define AFHDS2_PERIOD (2 * 1000) /* us */
 
 struct FlySkySerialPulsesData {
diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index 05f79c848..5407d431d 100755
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -364,7 +364,7 @@ static void enablePulsesInternalModule(uint8_t protocol)
       // serial port setup
       resetPulsesAFHDS2();
       intmoduleFifo.clear();
-      IntmoduleSerialDriver.init(&afhds2SerialInitParams)
+      IntmoduleSerialDriver.init(&afhds2SerialInitParams);
 
       // mixer setup
       mixerSchedulerSetPeriod(INTERNAL_MODULE, AFHDS2_PERIOD);
@@ -491,7 +491,7 @@ void intmoduleSendNextFrame()
   case PROTOCOL_CHANNELS_AFHDS2A: {
     uint8_t* data = (uint8_t*)intmodulePulsesData.flysky.pulses;
     uint16_t size = intmodulePulsesData.flysky.ptr - data;
-    intmoduleSendBuffer(data, size);
+    IntmoduleSerialDriver.sendBuffer(data, size);
   } break;
 #endif
   }
diff --git a/radio/src/targets/nv14/board.h b/radio/src/targets/nv14/board.h
index 6de0eaf03..2ceb31ac8 100644
--- a/radio/src/targets/nv14/board.h
+++ b/radio/src/targets/nv14/board.h
@@ -122,14 +122,6 @@ void EXTERNAL_MODULE_OFF();
 #define IS_UART_MODULE(port)            (port == INTERNAL_MODULE)
 #define IS_PXX2_INTERNAL_ENABLED()      (false)
 
-void init_intmodule_heartbeat();
-void check_intmodule_heartbeat();
-
-//void extmoduleSerialStart(uint32_t baudrate, uint32_t period_half_us, bool inverted);
-void extmoduleSerialStart();
-void extmoduleSendNextFrame();
-void extmoduleSendInvertedByte(uint8_t byte);
-
 // Trainer driver
 void init_trainer_ppm();
 void stop_trainer_ppm();
diff --git a/radio/src/targets/nv14/extmodule_driver.h b/radio/src/targets/nv14/extmodule_driver.h
new file mode 100644
index 000000000..0f05115a3
--- /dev/null
+++ b/radio/src/targets/nv14/extmodule_driver.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#pragma once
+
+#include "targets/horus/extmodule_driver.h"