the push is modified as follows:

1. delete some junk files.
2. mqttclient added comments and updated to v1.0.2.
3. update README.md.
4. update the author's own server certificate.
5. minor changes to salof.

components/connectivity/mqttclient/common/log/fifo.h

@@ -2,13 +2,15 @@
  * @Author: jiejie
  * @Github: https://github.com/jiejieTop
  * @Date: 2019-12-25 23:54:38
- * @LastEditTime : 2019-12-28 01:04:08
+ * @LastEditTime: 2020-02-25 08:10:01
  * @Description: the code belongs to jiejie, please keep the author information and source code according to the license.
  */
 #ifndef _FIFO_H_
 #define _FIFO_H_
 
-#include "config.h"
+#include "salof_defconfig.h"
+
+#ifdef USE_LOG
 
 #define			FIFO_READ		0
 #define			FIFO_WRITE		1
@@ -33,5 +35,7 @@ unsigned int fifo_read(fifo_t fifo, void *buff, unsigned int len, unsigned int t
 unsigned int fifo_read_able(fifo_t fifo);
 unsigned int fifo_write_able(fifo_t fifo);
 
+#endif
+
 #endif // !_FIFO_H_