update led and infrared source code

guowenxue

2021-01-09 d0a9532e1425c6052ac7221c45433a48bf43ba50

 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