diff --git a/README.md b/README.md
index ce0331e..2982de0 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,10 @@
 # node-red-i2c-nodes
 A collection of node-red nodes for assorted i2c devices
+
+All nodes use an [ inject ] node to send a string command of 'measure' to initiate sensor measurement based on values set in the config panels of the flow diagram.
+
+Outputs:
+
+#1 - measured and derived and calculated values from the sensor
+
+#2 - same as #1 but organized as AWS 'Thing State' for transmission to an AWS IOT MQTT broker.