diff --git a/radio/src/gui/gui_common.cpp b/radio/src/gui/gui_common.cpp
index 5f784b6a488..9b99465cbc0 100644
--- a/radio/src/gui/gui_common.cpp
+++ b/radio/src/gui/gui_common.cpp
@@ -1068,26 +1068,41 @@ bool isTrainerModeAvailable(int mode)
     return false;
 #endif
 
+  if (mode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE ||
+      mode == TRAINER_MODE_MASTER_CPPM_EXTERNAL_MODULE) {
+
 #if !defined(TRAINER_MODULE_CPPM)
-  if (mode == TRAINER_MODE_MASTER_CPPM_EXTERNAL_MODULE)
-    return false;
+    if (mode == TRAINER_MODE_MASTER_CPPM_EXTERNAL_MODULE)
+      return false;
 #endif
 
 #if !defined(TRAINER_MODULE_SBUS)
-  if (mode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE)
-    return false;
+    if (mode == mode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE)
+      return false;
 #endif
 
-#if defined(TRAINER_MODULE_CPPM) || defined(TRAINER_MODULE_SBUS)
-  if (IS_EXTERNAL_MODULE_ENABLED() &&
-      (mode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE ||
-       mode == TRAINER_MODE_MASTER_CPPM_EXTERNAL_MODULE))
-    return false;
+    // no external module or is enabled
+    if (!modulePortGetModuleDescription(EXTERNAL_MODULE) ||
+        IS_EXTERNAL_MODULE_ENABLED()) {
+      return false;
+    }
+
+    if (mode == TRAINER_MODE_MASTER_SBUS_EXTERNAL_MODULE) {
+#if defined(EXTMODULE_USART) || defined(CONFIGURABLE_MODULE_PORT)
+      auto port =  modulePortFind(EXTERNAL_MODULE, ETX_MOD_TYPE_SERIAL,
+                                  ETX_MOD_PORT_UART, ETX_Pol_Normal);
+      return port != nullptr;
+#elif defined(TRAINER_MODULE_SBUS_USART)
+      return true;
+#else
+      return false;
 #endif
+    }
+  }
 
-#if !defined(MULTIMODULE) || !defined(HARDWARE_INTERNAL_MODULE) || !defined(HARDWARE_EXTERNAL_MODULE)
-  if (mode == TRAINER_MODE_MULTI)
-    return false;
+#if !defined(MULTIMODULE) || !defined(HARDWARE_INTERNAL_MODULE) || \
+    !defined(HARDWARE_EXTERNAL_MODULE)
+  if (mode == TRAINER_MODE_MULTI) return false;
 #else
   if (mode == TRAINER_MODE_MULTI &&
       ((!IS_INTERNAL_MODULE_ENABLED() && !IS_EXTERNAL_MODULE_ENABLED()) ||
diff --git a/radio/src/targets/horus/hal.h b/radio/src/targets/horus/hal.h
index 232a19c125f..a382c6b1444 100644
--- a/radio/src/targets/horus/hal.h
+++ b/radio/src/targets/horus/hal.h
@@ -1007,6 +1007,10 @@
 #define TRAINER_MODULE_CPPM_TIMER_IRQHandler TIM4_IRQHandler
 #define TRAINER_MODULE_CPPM_GPIO_AF          LL_GPIO_AF_2
 
+#if defined(EXTMODULE_USART) || defined(CONFIGURABLE_MODULE_PORT)
+  #define TRAINER_MODULE_SBUS
+#endif
+
 // Millisecond timer
 #define MS_TIMER                        TIM14
 #define MS_TIMER_IRQn                   TIM8_TRG_COM_TIM14_IRQn
diff --git a/radio/src/targets/nv14/hal.h b/radio/src/targets/nv14/hal.h
index 7d93d7dda3f..227a31bba80 100644
--- a/radio/src/targets/nv14/hal.h
+++ b/radio/src/targets/nv14/hal.h
@@ -531,6 +531,7 @@
 #define TRAINER_GPIO_AF                 LL_GPIO_AF_2
 #define TRAINER_TIMER_FREQ              (PERI1_FREQUENCY * TIMER_MULT_APB1)
 
+#define TRAINER_MODULE_SBUS
 
 //BLUETOOTH
 #define BLUETOOTH_ON_RCC_AHB1Periph     RCC_AHB1Periph_GPIOI