diff --git a/V1.5/STM32F103_App1/HardWare/UART/uart.c b/V1.5/STM32F103_App1/HardWare/UART/uart.c
index 735e50e..9f5f818 100644
--- a/V1.5/STM32F103_App1/HardWare/UART/uart.c
+++ b/V1.5/STM32F103_App1/HardWare/UART/uart.c
@@ -1,5 +1,6 @@
 #include "uart.h"
 #include "network.h"
+#include "log.h"
 #include "hlw8032.h"
 #include <string.h>
 #include <ctype.h>
@@ -274,6 +275,12 @@ uint16_t USART2_GetRxIndex(void) { return uart2_cmd_index; }   /* 
 
 void USART2_FlushRxBuf(void)
 {
+    if (uart2_cmd_index > 0) {
+        char hex[3 * 24 + 1] = {0};
+        uint16_t n = uart2_cmd_index < 24 ? uart2_cmd_index : 24;
+        for (uint16_t i = 0; i < n; i++) snprintf(hex + i * 3, 4, "%02X ", uart2_cmd_buf[i]);
+        log_warn("> UART2: 清缓冲丢弃 %d 字节: %s", (int)uart2_cmd_index, hex);
+    }
     uart2_rx_ready = 0;
     uart2_cmd_index = 0;
     /* 兜底：接收中断意外停摆时（ORE 后状态卡 BUSY_RX）拉起来。不 Abort，不动正常状态 */
@@ -366,6 +373,11 @@ void USART2_Tick(void)
 {
     if (uart2_cmd_index > 0 &&
         (HAL_GetTick() - uart2_last_rx_tick) > UART2_CMD_TIMEOUT_MS) {
+        /* 排障：帧提交时打印内容（485 丢帧定位） */
+        char hex[3 * 24 + 1] = {0};
+        uint16_t n = uart2_cmd_index < 24 ? uart2_cmd_index : 24;
+        for (uint16_t i = 0; i < n; i++) snprintf(hex + i * 3, 4, "%02X ", uart2_cmd_buf[i]);
+        log_info("> UART2: 帧提交 %d 字节: %s", (int)uart2_cmd_index, hex);
         uart2_rx_ready = 1;
     }
 }