diff --git a/nuttx-configs/px4fmu-v5/nsh/defconfig b/nuttx-configs/px4fmu-v5/nsh/defconfig
index 1c64e9e162..d4b47a9f04 100644
--- a/nuttx-configs/px4fmu-v5/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v5/nsh/defconfig
@@ -816,9 +816,9 @@ CONFIG_UART8_SERIAL_CONSOLE=y
 #
 # USART1 Configuration
 #
-CONFIG_USART1_RXBUFSIZE=128
-CONFIG_USART1_TXBUFSIZE=32
-CONFIG_USART1_BAUD=115200
+CONFIG_USART1_RXBUFSIZE=300
+CONFIG_USART1_TXBUFSIZE=300
+CONFIG_USART1_BAUD=57600
 CONFIG_USART1_BITS=8
 CONFIG_USART1_PARITY=0
 CONFIG_USART1_2STOP=0
@@ -830,7 +830,7 @@ CONFIG_USART1_2STOP=0
 # USART2 Configuration
 #
 CONFIG_USART2_RXBUFSIZE=600
-CONFIG_USART2_TXBUFSIZE=1100
+CONFIG_USART2_TXBUFSIZE=1500
 CONFIG_USART2_BAUD=57600
 CONFIG_USART2_BITS=8
 CONFIG_USART2_PARITY=0
@@ -842,8 +842,8 @@ CONFIG_USART2_OFLOWCONTROL=y
 #
 # USART3 Configuration
 #
-CONFIG_USART3_RXBUFSIZE=300
-CONFIG_USART3_TXBUFSIZE=300
+CONFIG_USART3_RXBUFSIZE=600
+CONFIG_USART3_TXBUFSIZE=1500
 CONFIG_USART3_BAUD=57600
 CONFIG_USART3_BITS=8
 CONFIG_USART3_PARITY=0
@@ -855,9 +855,9 @@ CONFIG_USART3_OFLOWCONTROL=y
 #
 # UART4 Configuration
 #
-CONFIG_UART4_RXBUFSIZE=256
-CONFIG_UART4_TXBUFSIZE=256
-CONFIG_UART4_BAUD=115200
+CONFIG_UART4_RXBUFSIZE=300
+CONFIG_UART4_TXBUFSIZE=300
+CONFIG_UART4_BAUD=57600
 CONFIG_UART4_BITS=8
 CONFIG_UART4_PARITY=0
 CONFIG_UART4_2STOP=0