已经完成了网络，DI口，RS485的数据透传，可通过RS485接收数据

Core/Src/io_monitor.c

@@ -23,6 +23,7 @@
 #include "multi_uart_router.h"
 #include "main.h"
 #include <string.h>
+#include "data_source.h"
 
 /*==============================================================================
  * 调试宏定义
@@ -196,7 +197,7 @@ static void send_di_event(uint8_t channel, uint8_t state)
     uint8_t cs;
 
     /* 构造消息主体，channel+1将0-base转换为1-base的用户可见编号 */
-    int len = snprintf(msg, sizeof(msg), "$DI_EVENT,%d,%d*", channel + 1, state);
+    int len = snprintf(msg, sizeof(msg), "$DI_EVENT,%d,%d,%d*", channel + 1, state, SOURCE_DI);
 
     /* 计算异或校验和，跳过'$'符号只对正文部分计算 */
     cs = calc_checksum(msg + 1, len - 1);