diff --git a/V1.4/STM32F103_App1/HardWare/SYSINIT/app_loop.c b/V1.4/STM32F103_App1/HardWare/SYSINIT/app_loop.c
index 16bdbde..b27293f 100644
--- a/V1.4/STM32F103_App1/HardWare/SYSINIT/app_loop.c
+++ b/V1.4/STM32F103_App1/HardWare/SYSINIT/app_loop.c
@@ -57,7 +57,7 @@ void app_init(void)
 {
     log_info("");
     log_info("* * * * * * * * * * * * * * * * * *");
-    log_info("*       Version: 1.4.0 (RTOS)     *");
+    log_info("*       Version: 1.4.3 (RTOS)     *");
     log_info("* * * * * * *   By Helei   * * * *");
 
     /* EEPROM 中的 MQTT/版本配置 */
@@ -110,6 +110,8 @@ static void app_task(void *arg)
 
     /* 主循环状态变量 */
     static uint8_t  ota_confirmed = 0;
+    static uint8_t  ota_simulate_fail = 0;  /* =1测试：模拟 OTA 确认失败（验证回退） */
+    static uint8_t  ota_fail_logged = 0;
     static uint32_t ota_confirm_tick = 0;
     static uint32_t mqtt_ready_tick = 0;
     static uint8_t  mqtt_ready_recorded = 0;
@@ -135,9 +137,17 @@ static void app_task(void *arg)
         /* 首次发布成功后延迟 3s 再 OTA 确认 */
         if (!ota_confirmed && g_net_mqtt_ready && g_net_first_publish_ok &&
             (HAL_GetTick() - ota_confirm_tick) > 3000) {
-            ota_confirmed = 1;
-            NET_ota_confirm();
-            log_info("> OTA confirmed (MQTT ready + first publish ok + 3s delay)");
+            if (ota_simulate_fail) {
+                if (!ota_fail_logged) {
+                    ota_fail_logged = 1;
+                    log_info("> OTA confirm skipped (simulate fail for rollback test)");
+                }
+                /* 不置位 ota_confirmed，让 1 分钟健康超时触发复位 */
+            } else {
+                ota_confirmed = 1;
+                NET_ota_confirm();
+                log_info("> OTA confirmed (MQTT ready + first publish ok + 3s delay)");
+            }
         }
 
         /* MQTT 就绪后 1 分钟仍未首次 MPUB，主动复位 */
diff --git a/V1.4/STM32F103_App1/HardWare/USER_CMD/user_cmd.c b/V1.4/STM32F103_App1/HardWare/USER_CMD/user_cmd.c
index 58709b2..e2e704f 100644
--- a/V1.4/STM32F103_App1/HardWare/USER_CMD/user_cmd.c
+++ b/V1.4/STM32F103_App1/HardWare/USER_CMD/user_cmd.c
@@ -57,6 +57,8 @@ void process_usart1_command(void)
 
     if (cmd_is(cmd, "RESET")) {
         log_warn("> USART1 RESET command received, rebooting...");
+        HAL_Delay(100);
+        NVIC_SystemReset();
     }
     else if (cmd_is(cmd, "INFO")) {
         log_info("> BT INFO: ver=%u, server=%s:%d, client=%s",
@@ -86,6 +88,8 @@ void process_usart1_command(void)
     }
     else if (cmd_is(cmd, "OTA")) {
         log_info("> BT OTA: reboot to bootloader for OTA check");
+        HAL_Delay(100);
+        NVIC_SystemReset();
     }
     else if (cmd_is(cmd, "RECOVERY")) {
         /* WiFi 模块 AT+RESTORE 恢复出厂（忘掉已保存的热点），用于测试 SmartConfig；