diff --git a/devices/esp8266/esp8266.c b/devices/esp8266/esp8266.c
index bfbc1c4e..732700c3 100644
--- a/devices/esp8266/esp8266.c
+++ b/devices/esp8266/esp8266.c
@@ -475,3 +475,18 @@ int esp8266_sal_init(hal_uart_port_t uart_port)
     return 0;
 }
 
+int esp8266_sal_deinit()
+{
+    int id = 0;
+
+    for (id = 0; id < AT_DATA_CHANNEL_NUM; ++id) {
+        tos_sal_module_close(id);
+    }
+
+    tos_sal_module_register_default();
+
+    tos_at_deinit();
+    
+    return 0;
+}
+
diff --git a/devices/esp8266/esp8266.h b/devices/esp8266/esp8266.h
index c5add3f9..2e8370a7 100644
--- a/devices/esp8266/esp8266.h
+++ b/devices/esp8266/esp8266.h
@@ -40,5 +40,7 @@ int esp8266_sal_init(hal_uart_port_t uart_port);
 
 int esp8266_join_ap(const char *ssid, const char *pwd);
 
+int esp8266_sal_deinit(void);
+
 #endif /* __ESP8266_H__ */