diff --git a/src/main/drivers/serial_uart.c b/src/main/drivers/serial_uart.c
index 4663701179..f634b97f95 100644
--- a/src/main/drivers/serial_uart.c
+++ b/src/main/drivers/serial_uart.c
@@ -97,8 +97,12 @@ serialPort_t *uartOpen(USART_TypeDef *USARTx, serialReceiveCallbackPtr callback,
 {
     uartPort_t *s = NULL;
 
-    if (USARTx == USART1) {
+    if (false) {
+#ifdef USE_UART1
+    } else if (USARTx == USART1) {
         s = serialUART1(baudRate, mode, options);
+
+#endif
 #ifdef USE_UART2
     } else if (USARTx == USART2) {
         s = serialUART2(baudRate, mode, options);
diff --git a/src/main/main.c b/src/main/main.c
index 63db2d1d64..5a0d3aaae4 100644
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -224,7 +224,10 @@ void init(void)
 
     dmaInit();
 
-#if defined(AVOID_UART2_FOR_PWM_PPM)
+#if defined(AVOID_UART1_FOR_PWM_PPM)
+    serialInit(&masterConfig.serialConfig, feature(FEATURE_SOFTSERIAL),
+            feature(FEATURE_RX_PPM) || feature(FEATURE_RX_PARALLEL_PWM) ? SERIAL_PORT_USART1 : SERIAL_PORT_NONE);
+#elif defined(AVOID_UART2_FOR_PWM_PPM)
     serialInit(&masterConfig.serialConfig, feature(FEATURE_SOFTSERIAL),
             feature(FEATURE_RX_PPM) || feature(FEATURE_RX_PARALLEL_PWM) ? SERIAL_PORT_USART2 : SERIAL_PORT_NONE);
 #elif defined(AVOID_UART3_FOR_PWM_PPM)
diff --git a/src/main/target/OMNIBUSF4/target.c b/src/main/target/OMNIBUSF4/target.c
index 4ab3802e49..bfa6e48435 100644
--- a/src/main/target/OMNIBUSF4/target.c
+++ b/src/main/target/OMNIBUSF4/target.c
@@ -22,7 +22,7 @@
 #include "drivers/pwm_mapping.h"
 
 const uint16_t multiPPM[] = {
-    PWM6  | (MAP_TO_PPM_INPUT << 8),     // PPM input
+    PWM1  | (MAP_TO_PPM_INPUT << 8),     // PPM input
     PWM7  | (MAP_TO_MOTOR_OUTPUT << 8),  // Swap to servo if needed
     PWM8  | (MAP_TO_MOTOR_OUTPUT << 8),  // Swap to servo if needed
     PWM9  | (MAP_TO_MOTOR_OUTPUT << 8),
@@ -49,7 +49,7 @@ const uint16_t multiPWM[] = {
 };
 
 const uint16_t airPPM[] = {
-    PWM6  | (MAP_TO_PPM_INPUT << 8),     // PPM input
+    PWM1  | (MAP_TO_PPM_INPUT << 8),     // PPM input
     PWM7  | (MAP_TO_MOTOR_OUTPUT  << 8),
     PWM8  | (MAP_TO_MOTOR_OUTPUT  << 8),
     PWM9  | (MAP_TO_SERVO_OUTPUT  << 8),
@@ -77,17 +77,17 @@ const uint16_t airPWM[] = {
 
 
 const timerHardware_t timerHardware[USABLE_TIMER_CHANNEL_COUNT] = {
-    { TIM12, IO_TAG(PB14), TIM_Channel_1, TIM8_BRK_TIM12_IRQn, 0, IOCFG_IPD, GPIO_AF_TIM12 },// PPM (5th pin on FlexiIO port)
-    { TIM12, IO_TAG(PB15), TIM_Channel_2, TIM8_BRK_TIM12_IRQn, 0, IOCFG_IPD, GPIO_AF_TIM12 },// S2_IN - GPIO_PartialRemap_TIM3
-    { TIM8,  IO_TAG(PC6),  TIM_Channel_1, TIM8_CC_IRQn,        0, IOCFG_IPD, GPIO_AF_TIM8 }, // S3_IN
-    { TIM8,  IO_TAG(PC7),  TIM_Channel_2, TIM8_CC_IRQn,        0, IOCFG_IPD, GPIO_AF_TIM8 }, // S4_IN
-    { TIM8,  IO_TAG(PC8),  TIM_Channel_3, TIM8_CC_IRQn,        0, IOCFG_IPD, GPIO_AF_TIM8 }, // S5_IN
-    { TIM8,  IO_TAG(PC9),  TIM_Channel_4, TIM8_CC_IRQn,        0, IOCFG_IPD, GPIO_AF_TIM8 }, // S6_IN
+    { TIM12, IO_TAG(PB14), TIM_Channel_1, TIM8_BRK_TIM12_IRQn, 0, IOCFG_AF_PP, GPIO_AF_TIM12 },// PPM (5th pin on FlexiIO port)
+    { TIM12, IO_TAG(PB15), TIM_Channel_2, TIM8_BRK_TIM12_IRQn, 0, IOCFG_AF_PP, GPIO_AF_TIM12 },// S2_IN - GPIO_PartialRemap_TIM3
+    { TIM8,  IO_TAG(PC6),  TIM_Channel_1, TIM8_CC_IRQn,        0, IOCFG_AF_PP, GPIO_AF_TIM8 }, // S3_IN
+    { TIM8,  IO_TAG(PC7),  TIM_Channel_2, TIM8_CC_IRQn,        0, IOCFG_AF_PP, GPIO_AF_TIM8 }, // S4_IN
+    { TIM8,  IO_TAG(PC8),  TIM_Channel_3, TIM8_CC_IRQn,        0, IOCFG_AF_PP, GPIO_AF_TIM8 }, // S5_IN
+    { TIM8,  IO_TAG(PC9),  TIM_Channel_4, TIM8_CC_IRQn,        0, IOCFG_AF_PP, GPIO_AF_TIM8 }, // S6_IN
 
-    { TIM3,  IO_TAG(PB0),  TIM_Channel_3, TIM3_IRQn,           1, IOCFG_AF_PP_PD, GPIO_AF_TIM3 }, // S1_OUT
-    { TIM3,  IO_TAG(PB1),  TIM_Channel_4, TIM3_IRQn,           1, IOCFG_AF_PP_PD, GPIO_AF_TIM3 }, // S2_OUT
-    { TIM9,  IO_TAG(PA3),  TIM_Channel_2, TIM1_BRK_TIM9_IRQn,  1, IOCFG_AF_PP_PD, GPIO_AF_TIM9 }, // S4_OUT
-    { TIM2,  IO_TAG(PA2),  TIM_Channel_3, TIM2_IRQn,           1, IOCFG_AF_PP_PD, GPIO_AF_TIM2 }, // S4_OUT
-    { TIM5,  IO_TAG(PA1),  TIM_Channel_2, TIM5_IRQn,           1, IOCFG_AF_PP_PD, GPIO_AF_TIM5 }, // S5_OUT - GPIO_PartialRemap_TIM3
-    { TIM1,  IO_TAG(PA8),  TIM_Channel_1, TIM1_CC_IRQn,        1, IOCFG_AF_PP_PD, GPIO_AF_TIM1 }, // S6_OUT
+    { TIM3,  IO_TAG(PB0),  TIM_Channel_3, TIM3_IRQn,           1, IOCFG_AF_PP, GPIO_AF_TIM3 }, // S1_OUT
+    { TIM3,  IO_TAG(PB1),  TIM_Channel_4, TIM3_IRQn,           1, IOCFG_AF_PP, GPIO_AF_TIM3 }, // S2_OUT
+    { TIM9,  IO_TAG(PA3),  TIM_Channel_2, TIM1_BRK_TIM9_IRQn,  1, IOCFG_AF_PP, GPIO_AF_TIM9 }, // S4_OUT
+    { TIM2,  IO_TAG(PA2),  TIM_Channel_3, TIM2_IRQn,           1, IOCFG_AF_PP, GPIO_AF_TIM2 }, // S4_OUT
+    { TIM5,  IO_TAG(PA1),  TIM_Channel_2, TIM5_IRQn,           1, IOCFG_AF_PP, GPIO_AF_TIM5 }, // S5_OUT - GPIO_PartialRemap_TIM3
+    { TIM1,  IO_TAG(PA8),  TIM_Channel_1, TIM1_CC_IRQn,        1, IOCFG_AF_PP, GPIO_AF_TIM1 }, // S6_OUT
 };
diff --git a/src/main/target/OMNIBUSF4/target.h b/src/main/target/OMNIBUSF4/target.h
index 1696f417f7..2172167bc2 100644
--- a/src/main/target/OMNIBUSF4/target.h
+++ b/src/main/target/OMNIBUSF4/target.h
@@ -136,6 +136,8 @@
 #define DEFAULT_RX_FEATURE      FEATURE_RX_PPM
 #define DEFAULT_FEATURES        (FEATURE_BLACKBOX | FEATURE_RX_SERIAL)
 
+#define AVOID_UART1_FOR_PWM_PPM
+
 #define USE_SERIAL_4WAY_BLHELI_INTERFACE
 
 #define TARGET_IO_PORTA 0xffff