Add iotd program framework source code

guowenxue

2021-04-20 c7b6f4f68a6c9e8e83849601bd0f5240c47c317f

 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