diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig
index ec945a842d2..67ab60d399f 100644
--- a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig
+++ b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-6lowpan/defconfig
@@ -86,9 +86,6 @@ CONFIG_NSH_DISABLE_WGET=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
-CONFIG_RAMLOG=y
-CONFIG_RAMLOG_BUFSIZE=8192
-CONFIG_RAMLOG_SYSLOG=y
 CONFIG_RAM_SIZE=131072
 CONFIG_RAM_START=0x20000000
 CONFIG_RAW_BINARY=y
@@ -98,13 +95,13 @@ CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=160
 CONFIG_SCHED_WAITPID=y
-CONFIG_STANDARD_SERIAL=y
 CONFIG_START_YEAR=2013
 CONFIG_STM32_CCMEXCLUDE=y
 CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG=y
 CONFIG_STM32_JTAG_SW_ENABLE=y
 CONFIG_STM32_OTGFS=y
 CONFIG_STM32_PWR=y
+CONFIG_STM32_USART3=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_TELNET_CLIENT=y
 CONFIG_TASK_NAME_SIZE=32
diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig
index e2d0573d375..e1ef142038b 100644
--- a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig
+++ b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starhub/defconfig
@@ -71,9 +71,6 @@ CONFIG_NSH_DISABLE_WGET=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
-CONFIG_RAMLOG=y
-CONFIG_RAMLOG_BUFSIZE=8192
-CONFIG_RAMLOG_SYSLOG=y
 CONFIG_RAM_SIZE=131072
 CONFIG_RAM_START=0x20000000
 CONFIG_RAW_BINARY=y
@@ -83,13 +80,13 @@ CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=160
 CONFIG_SCHED_WAITPID=y
-CONFIG_STANDARD_SERIAL=y
 CONFIG_START_YEAR=2013
 CONFIG_STM32_CCMEXCLUDE=y
 CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG=y
 CONFIG_STM32_JTAG_SW_ENABLE=y
 CONFIG_STM32_OTGFS=y
 CONFIG_STM32_PWR=y
+CONFIG_STM32_USART3=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_TELNET_CLIENT=y
 CONFIG_TASK_NAME_SIZE=32
diff --git a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig
index 41979e5b8dc..bcf0a9488d4 100644
--- a/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig
+++ b/boards/arm/stm32/clicker2-stm32/configs/mrf24j40-starpoint/defconfig
@@ -88,9 +88,6 @@ CONFIG_NSH_DISABLE_WGET=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
-CONFIG_RAMLOG=y
-CONFIG_RAMLOG_BUFSIZE=8192
-CONFIG_RAMLOG_SYSLOG=y
 CONFIG_RAM_SIZE=131072
 CONFIG_RAM_START=0x20000000
 CONFIG_RAW_BINARY=y
@@ -100,13 +97,13 @@ CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=160
 CONFIG_SCHED_WAITPID=y
-CONFIG_STANDARD_SERIAL=y
 CONFIG_START_YEAR=2013
 CONFIG_STM32_CCMEXCLUDE=y
 CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG=y
 CONFIG_STM32_JTAG_SW_ENABLE=y
 CONFIG_STM32_OTGFS=y
 CONFIG_STM32_PWR=y
+CONFIG_STM32_USART3=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_TASK_NAME_SIZE=32
 CONFIG_USBDEV=y
diff --git a/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig b/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig
index 24997bab893..49f6d164081 100644
--- a/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig
+++ b/boards/arm/stm32/clicker2-stm32/configs/xbee-6lowpan/defconfig
@@ -82,9 +82,6 @@ CONFIG_NSH_DISABLE_WGET=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
 CONFIG_PREALLOC_TIMERS=4
-CONFIG_RAMLOG=y
-CONFIG_RAMLOG_BUFSIZE=8192
-CONFIG_RAMLOG_SYSLOG=y
 CONFIG_RAM_SIZE=131072
 CONFIG_RAM_START=0x20000000
 CONFIG_RAW_BINARY=y
@@ -94,13 +91,13 @@ CONFIG_SCHED_HPWORKPRIORITY=192
 CONFIG_SCHED_LPWORK=y
 CONFIG_SCHED_LPWORKPRIORITY=160
 CONFIG_SCHED_WAITPID=y
-CONFIG_STANDARD_SERIAL=y
 CONFIG_START_YEAR=2013
 CONFIG_STM32_CCMEXCLUDE=y
 CONFIG_STM32_DISABLE_IDLE_SLEEP_DURING_DEBUG=y
 CONFIG_STM32_JTAG_SW_ENABLE=y
 CONFIG_STM32_OTGFS=y
 CONFIG_STM32_PWR=y
+CONFIG_STM32_USART3=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_SYSTEM_TELNET_CLIENT=y
 CONFIG_TASK_NAME_SIZE=32