update led and gpio program

guowenxue

2021-11-03 1a128c78e4119cae8d35b661149a12d0fd083b1a

 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