connect pill_serial directly to rpi usb port
[air-quality] / system /
drwxr-xr-x   ..
-rw-r--r-- 150 air-dsm501.service
-rw-r--r-- 151 air-mh-z19b.service
-rw-r--r-- 146 air-mq.service
-rw-r--r-- 147 air-mq7.service
-rw-r--r-- 149 air-zph02.service
-rw-r--r-- 168 audio2influx.service