diff --git a/examples/serial/mb_serial_master/sdkconfig.ci.ascii b/examples/serial/mb_serial_master/sdkconfig.ci.ascii
index 830b889..7b5b212 100644
--- a/examples/serial/mb_serial_master/sdkconfig.ci.ascii
+++ b/examples/serial/mb_serial_master/sdkconfig.ci.ascii
@@ -7,4 +7,5 @@ CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_HEAP_POISONING_COMPREHENSIVE=y
 CONFIG_HEAP_TRACING_OFF=y
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
 
diff --git a/examples/serial/mb_serial_master/sdkconfig.ci.rtu b/examples/serial/mb_serial_master/sdkconfig.ci.rtu
index 80f3665..18970a6 100644
--- a/examples/serial/mb_serial_master/sdkconfig.ci.rtu
+++ b/examples/serial/mb_serial_master/sdkconfig.ci.rtu
@@ -7,3 +7,4 @@ CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_HEAP_POISONING_COMPREHENSIVE=y
 CONFIG_HEAP_TRACING_OFF=y
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
diff --git a/examples/serial/mb_serial_slave/sdkconfig.ci.ascii b/examples/serial/mb_serial_slave/sdkconfig.ci.ascii
index 67171ae..a81dcc6 100644
--- a/examples/serial/mb_serial_slave/sdkconfig.ci.ascii
+++ b/examples/serial/mb_serial_slave/sdkconfig.ci.ascii
@@ -6,3 +6,4 @@ CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_HEAP_POISONING_COMPREHENSIVE=y
 CONFIG_HEAP_TRACING_OFF=y
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
diff --git a/examples/serial/mb_serial_slave/sdkconfig.ci.rtu b/examples/serial/mb_serial_slave/sdkconfig.ci.rtu
index 469e31b..bfd1e6c 100644
--- a/examples/serial/mb_serial_slave/sdkconfig.ci.rtu
+++ b/examples/serial/mb_serial_slave/sdkconfig.ci.rtu
@@ -6,3 +6,4 @@ CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_HEAP_POISONING_COMPREHENSIVE=y
 CONFIG_HEAP_TRACING_OFF=y
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
diff --git a/examples/tcp/mb_tcp_master/sdkconfig.ci.ethernet b/examples/tcp/mb_tcp_master/sdkconfig.ci.ethernet
index 0225375..588104d 100644
--- a/examples/tcp/mb_tcp_master/sdkconfig.ci.ethernet
+++ b/examples/tcp/mb_tcp_master/sdkconfig.ci.ethernet
@@ -13,7 +13,7 @@ CONFIG_FMB_MASTER_DELAY_MS_CONVERT=300
 CONFIG_FMB_TCP_UID_ENABLED=n
 CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_MB_SLAVE_IP_FROM_STDIN=y
-# CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 
 CONFIG_EXAMPLE_CONNECT_IPV6=n
diff --git a/examples/tcp/mb_tcp_master/sdkconfig.ci.wifi b/examples/tcp/mb_tcp_master/sdkconfig.ci.wifi
index c1f520d..7b44eae 100644
--- a/examples/tcp/mb_tcp_master/sdkconfig.ci.wifi
+++ b/examples/tcp/mb_tcp_master/sdkconfig.ci.wifi
@@ -7,7 +7,7 @@ CONFIG_FMB_COMM_MODE_RTU_EN=n
 CONFIG_FMB_COMM_MODE_ASCII_EN=n
 CONFIG_FMB_MASTER_TIMEOUT_MS_RESPOND=3000
 CONFIG_FMB_MASTER_DELAY_MS_CONVERT=300
-# CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed
 CONFIG_FMB_TCP_UID_ENABLED=n
 CONFIG_MB_SLAVE_IP_FROM_STDIN=y
 CONFIG_EXAMPLE_CONNECT_IPV6=n
diff --git a/examples/tcp/mb_tcp_slave/sdkconfig.ci.ethernet b/examples/tcp/mb_tcp_slave/sdkconfig.ci.ethernet
index 01424b1..ba94844 100644
--- a/examples/tcp/mb_tcp_slave/sdkconfig.ci.ethernet
+++ b/examples/tcp/mb_tcp_slave/sdkconfig.ci.ethernet
@@ -14,7 +14,7 @@ CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_FMB_TCP_UID_ENABLED=n
 CONFIG_FMB_TIMER_USE_ISR_DISPATCH_METHOD=y
 CONFIG_MB_SLAVE_ADDR=1
-# CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
 CONFIG_EXAMPLE_CONNECT_IPV6=n
 CONFIG_EXAMPLE_CONNECT_WIFI=n
 CONFIG_EXAMPLE_CONNECT_ETHERNET=y
diff --git a/examples/tcp/mb_tcp_slave/sdkconfig.ci.wifi b/examples/tcp/mb_tcp_slave/sdkconfig.ci.wifi
index 1f05e52..08084a0 100644
--- a/examples/tcp/mb_tcp_slave/sdkconfig.ci.wifi
+++ b/examples/tcp/mb_tcp_slave/sdkconfig.ci.wifi
@@ -8,7 +8,7 @@ CONFIG_FMB_COMM_MODE_ASCII_EN=n
 CONFIG_FMB_EXT_TYPE_SUPPORT=y
 CONFIG_FMB_MASTER_TIMEOUT_MS_RESPOND=3000
 CONFIG_FMB_MASTER_DELAY_MS_CONVERT=300
-# CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
+CONFIG_LOG_DEFAULT_LEVEL_DEBUG=y # intentionally keep it here to change when needed!
 CONFIG_FMB_TCP_UID_ENABLED=n
 CONFIG_MB_SLAVE_ADDR=1
 CONFIG_EXAMPLE_CONNECT_IPV6=n