i could not get example in section 3.3 to turn on and off GPIO on pi. 

i used mosquitto_pub – and vmosquitto_sub to confirm the broker was working.  When i tried to inject a boolean 1 or 0 the light on the pi remained on.

I finally changed the GPIO pin on previous example and got the testing on page 118 to work. 
 It turns out that the previous tabs were active.   So all the tabs have global scope unless the disabled button is clicked?   I think the instructions said i could delete all the previous tabs but i 
wanted to keep my work.  So i answered this question… and discovered the disable button!

Question: is there a way to add documentation to the  node-red palette?