add and add mqttd proc.c and main.c, set 3 threads running

guowenxue

2019-06-25 0c6d37d6eb4eae9a91c7433adc7e76ba54c67c0f

 modules/python/sht20.py

old mode 100644
new mode 100755
@@ -1,4 +1,6 @@
#!/usr/bin/python
#-*- coding: utf-8 -*-

import fcntl
import time
import unittest