typo

README.md

@@ -78,7 +78,7 @@ You can see a full example of this in the `ExampleNode` sketch.
 ## Calling Behaviours
 
 Behaviours can currently be called in two ways:
-* via Node RED, by sending a message on the channel. So, instead of sending '100' to make the node wiggle, now you have to sent 'wiggle 100'.
+* via Node RED, by sending a message on the channel. So, instead of sending '100' to make the node wiggle, now you have to send 'wiggle 100'.
 * you can also do this using the Arduino serial monitor, to make it easier to test
 
 Each `Behaviour` has a unique name, and some number of parameters (mostly none, or one).