diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4541ccc..a0fb22b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,5 +3,4 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 
 project(new_kbd)
 
-target_sources(app PRIVATE src/main.c
-                           src/modules/led_module.c)
+target_sources(app PRIVATE src/main.c)
diff --git a/prj.conf b/prj.conf
index 4c27504..09fa7b0 100644
--- a/prj.conf
+++ b/prj.conf
@@ -1,4 +1,14 @@
 CONFIG_CAF=y
 CONFIG_HEAP_MEM_POOL_SIZE=2048
 CONFIG_LOG=y
-CONFIG_GPIO=y
+
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_CAF_LEDS=y
+CONFIG_CAF_LEDS_GPIO=y
+CONFIG_CAF_LEDS_PM_EVENTS=y
+
+CONFIG_CAF_POWER_MANAGER=y
+CONFIG_CAF_POWER_MANAGER_TIMEOUT=20
+CONFIG_CAF_POWER_MANAGER_ERROR_TIMEOUT=10
+CONFIG_REBOOT=y
diff --git a/src/main.c b/src/main.c
index f162000..a2a2676 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,14 +3,33 @@
 #define MODULE main
 #include <caf/events/module_state_event.h>
 
+#include <caf/events/led_event.h>
+#include <caf/led_effect.h>
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(MODULE);
 
+/*
+ * 通过 CAF leds 模块控制第 0 号 LED 常亮。
+ * 颜色值在单色 LED 上会被折算为亮度，因此这里使用白色全亮。
+ */
+static const struct led_effect startup_led_effect =
+	LED_EFFECT_LED_ON(LED_COLOR(255, 255, 255));
+
 int main(void)
 {
 	if (app_event_manager_init()) {
 		LOG_ERR("Application Event Manager not initialized");
 	} else {
+		/*
+		 * 先提交 led_event，再上报 main ready。
+		 * CAF leds 模块会缓存 effect，并在收到 main ready 完成初始化后开始输出。
+		 */
+		struct led_event *event = new_led_event();
+
+		event->led_id = 0;
+		event->led_effect = &startup_led_effect;
+		APP_EVENT_SUBMIT(event);
+
 		module_set_state(MODULE_STATE_READY);
 	}
 
diff --git a/src/modules/led_module.c b/src/modules/led_module.c
deleted file mode 100644
index 5f2c33c..0000000
--- a/src/modules/led_module.c
+++ /dev/null
@@ -1,43 +0,0 @@
-#include <app_event_manager.h>
-#define MODULE led
-#include <caf/events/module_state_event.h>
-
-#include <zephyr/drivers/gpio.h>
-#include <zephyr/logging/log.h>
-LOG_MODULE_REGISTER(MODULE);
-
-static const struct gpio_dt_spec status_led = GPIO_DT_SPEC_GET(DT_PATH(led_0, chan0), gpios);
-
-static void led_module_start(void)
-{
-	if (!gpio_is_ready_dt(&status_led)) {
-		LOG_ERR("LED GPIO controller is not ready");
-		return;
-	}
-
-	int err = gpio_pin_configure_dt(&status_led, GPIO_OUTPUT_ACTIVE);
-	if (err) {
-		LOG_ERR("Failed to turn on LED (err: %d)", err);
-		return;
-	}
-
-	LOG_INF("LED is on");
-}
-
-static bool app_event_handler(const struct app_event_header *aeh)
-{
-	/* 仅处理 module_state_event，其他事件交给系统继续分发。 */
-	if (is_module_state_event(aeh)) {
-		const struct module_state_event *event = cast_module_state_event(aeh);
-
-		if (check_state(event, MODULE_ID(main), MODULE_STATE_READY)) {
-			led_module_start();
-		}
-	}
-
-	return false;
-}
-
-APP_EVENT_LISTENER(led_module, app_event_handler);
-APP_EVENT_SUBSCRIBE(led_module, module_state_event);
-