diff --git a/Makefile b/Makefile
index e87c440..928a4a9 100644
--- a/Makefile
+++ b/Makefile
@@ -200,7 +200,7 @@ CPPWARN = -Wall -Wextra -Wundef
 #
 
 # List all user C define here, like -D_DEBUG=1
-UDEFS = -DSHELL_CMD_TEST_ENABLED=FALSE -DARM_MATH_CM0
+UDEFS = -DSHELL_CMD_TEST_ENABLED=FALSE -DSHELL_CMD_MEM_ENABLED=FALSE -DARM_MATH_CM0
 
 # Define ASM defines here
 UADEFS =
diff --git a/chconf.h b/chconf.h
index b4dc069..5599a4b 100644
--- a/chconf.h
+++ b/chconf.h
@@ -164,7 +164,7 @@
  *
  * @note    The default is @p TRUE.
  */
-#define CH_CFG_USE_SEMAPHORES               TRUE
+#define CH_CFG_USE_SEMAPHORES               FALSE
 
 /**
  * @brief   Semaphores queuing mode.
@@ -203,7 +203,7 @@
  * @note    The default is @p TRUE.
  * @note    Requires @p CH_CFG_USE_MUTEXES.
  */
-#define CH_CFG_USE_CONDVARS                 TRUE
+#define CH_CFG_USE_CONDVARS                 FALSE
 
 /**
  * @brief   Conditional Variables APIs with timeout.
@@ -213,7 +213,7 @@
  * @note    The default is @p TRUE.
  * @note    Requires @p CH_CFG_USE_CONDVARS.
  */
-#define CH_CFG_USE_CONDVARS_TIMEOUT         TRUE
+#define CH_CFG_USE_CONDVARS_TIMEOUT         FALSE
 
 /**
  * @brief   Events Flags APIs.
@@ -240,7 +240,7 @@
  *
  * @note    The default is @p TRUE.
  */
-#define CH_CFG_USE_MESSAGES                 TRUE
+#define CH_CFG_USE_MESSAGES                 FALSE
 
 /**
  * @brief   Synchronous Messages queuing mode.
@@ -261,7 +261,7 @@
  * @note    The default is @p TRUE.
  * @note    Requires @p CH_CFG_USE_SEMAPHORES.
  */
-#define CH_CFG_USE_MAILBOXES                TRUE
+#define CH_CFG_USE_MAILBOXES                FALSE
 
 /**
  * @brief   I/O Queues APIs.
@@ -278,7 +278,7 @@
  *
  * @note    The default is @p TRUE.
  */
-#define CH_CFG_USE_MEMCORE                  TRUE
+#define CH_CFG_USE_MEMCORE                  FALSE
 
 /**
  * @brief   Heap Allocator APIs.
@@ -290,7 +290,7 @@
  *          @p CH_CFG_USE_SEMAPHORES.
  * @note    Mutexes are recommended.
  */
-#define CH_CFG_USE_HEAP                     TRUE
+#define CH_CFG_USE_HEAP                     FALSE
 
 /**
  * @brief   Memory Pools Allocator APIs.
@@ -299,7 +299,7 @@
  *
  * @note    The default is @p TRUE.
  */
-#define CH_CFG_USE_MEMPOOLS                 TRUE
+#define CH_CFG_USE_MEMPOOLS                 FALSE
 
 /**
  * @brief   Dynamic Threads APIs.
@@ -310,7 +310,7 @@
  * @note    Requires @p CH_CFG_USE_WAITEXIT.
  * @note    Requires @p CH_CFG_USE_HEAP and/or @p CH_CFG_USE_MEMPOOLS.
  */
-#define CH_CFG_USE_DYNAMIC                  TRUE
+#define CH_CFG_USE_DYNAMIC                  FALSE
 
 /** @} */
 
@@ -335,7 +335,7 @@
  *
  * @note    The default is @p FALSE.
  */
-#define CH_DBG_SYSTEM_STATE_CHECK           TRUE
+#define CH_DBG_SYSTEM_STATE_CHECK           FALSE
 
 /**
  * @brief   Debug option, parameters checks.
@@ -344,7 +344,7 @@
  *
  * @note    The default is @p FALSE.
  */
-#define CH_DBG_ENABLE_CHECKS                TRUE
+#define CH_DBG_ENABLE_CHECKS                FALSE
 
 /**
  * @brief   Debug option, consistency checks.
@@ -354,7 +354,7 @@
  *
  * @note    The default is @p FALSE.
  */
-#define CH_DBG_ENABLE_ASSERTS               TRUE
+#define CH_DBG_ENABLE_ASSERTS               FALSE
 
 /**
  * @brief   Debug option, trace buffer.