diff --git a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
index 059293e..c1607e3 100644
--- a/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
+++ b/BLE/DLD154Pro_Peripheral_28K/APP/peripheral_main.c
@@ -847,7 +847,38 @@ void cjq_srv(void){
     }
 }
 
+/*===========================================================================
+ * opt_input_poll - 光耦输入处理
+ *
+ * g_fm_radar_input_disable == 0: 雷达输入模式 (暂未实现)
+ * g_fm_radar_input_disable == 1: 光耦复位模式
+ *   PB10 低电平 >=500ms -> 触发 INIT_VD() 复位检测器
+ *===========================================================================*/
+static void opt_input_poll(void)
+{
+    static uint32_t _opt_low_since = 0;  // PB10 变低的时刻
+    static uint8_t  _opt_fired    = 0;   // 本次已触发, 等待释放
 
+    if (g_fm_radar_input_disable == 0) {
+        _opt_low_since = 0;
+        _opt_fired     = 0;
+        return;
+    }
+
+    if (OPT_IN1 == 0) {  // 光耦导通 -> 低电平
+        if (_opt_low_since == 0) {
+            _opt_low_since = mstick();
+        } else if (!_opt_fired && (mstick() - _opt_low_since >= 500)) {
+            _opt_fired = 1;
+            INIT_VD();
+            rs485_reset_heartbeat();
+            PRINT("OPT: reset triggered\n");
+        }
+    } else {
+        _opt_low_since = 0;
+        _opt_fired     = 0;
+    }
+}
 
 
 /*********************************************************************
@@ -869,6 +900,8 @@ void Main_Circulation()
 
         cjq_srv();
 
+        opt_input_poll();   // 光耦输入处理 (复位 / 雷达)
+
         rs485_poll();   // RS485 700BS 协议: 命令处理 + 心跳上报
 
         if(g_flag_bt_state == 0){