diff --git a/library/drv_peripheral/drv_eg25gminipice.h b/library/drv_peripheral/drv_eg25gminipice.h
index 2ce8bed..ed0b911 100644
--- a/library/drv_peripheral/drv_eg25gminipice.h
+++ b/library/drv_peripheral/drv_eg25gminipice.h
@@ -18,7 +18,13 @@
 
 #include "ucos_ii.h"
 
-
+void drv_uart2_Init(void);
+void drv_uart2_sendbyte(char c);
+void drv_uart2_sendString(const char *str);
+void drv_send_at_cmd(const char *cmd, int delay_ms);
+void drv_eg25g_init(void);
+void drv_mqtt_connect(void);
+void drv_mqtt_publish(const char *topic, const char *message);