update led and gpio program

guowenxue

2021-11-03 220397d6e51dd15d74fbd41cfdc9c72aced45119

 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