As per this link Take picture when motion with Pi 3 and Agent 2.0 CayenneMQTTClient() and notify by email - how to trigger a script on Pi 3 , I tried to create button to start the script but did not work. Could you confirm what is the content of ButtonS and Quit widgets.
I have attached my Buttons, please confirm what changes has to be made to work it.
Code Location - /home/pi/start.py
image|690x488