document arduino mq7 setup

[air-quality] / README

diff --git a/README b/README
index 0c56215..d8b6ab1 100644 (file)
--- a/README
+++ b/README
@@ -12,3 +12,16 @@ network latency to influxdb (which is somewhere in the cloud, and
 latency can vary just enough to create empty vertical stripes in
 graphs which is ugly and incorrect).
 
 latency can vary just enough to create empty vertical stripes in
 graphs which is ugly and incorrect).
 

+
+Exception to that rule is dsm501.pl which is general serial to
+influx bridge used by helper shell scripts to handle sensors
+which require 5V by connecting them to Arduino-like mcu.
+Example of that is:
+
+mq7.sh
+
+which uses https://github.com/dpavlin/mq7-co-monitor/
+
+on Arduino to produce output which is then fed to dsm501.pl.
+
+