mention serial ports 3v3

diff --git a/README b/README
index aa1c861..e54c333 100644 (file)
--- a/README
+++ b/README
@@ -1,6 +1,8 @@
 Experiments with air quality sensors
 
 Experiments with air quality sensors
 

-Scripts in this directory talk to sensors and store data into influxdb.
+Scripts in this directory read from sesor serial port output (which
+is 3.3V serial connected to usb serial dongle) and store data to
+influxdb using curl.

 
 When receiving data from sensors, they check  header and checksum to
 avoid sending garbage data. This also helps when you select wrong
 
 When receiving data from sensors, they check  header and checksum to
 avoid sending garbage data. This also helps when you select wrong