update mqttd program, add relay and beep code

guowenxue

2019-06-24 8da36d4f82336087de47f5eadcf2373f4843e292

 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