Hi FedxE,I looked over the code and realized that it was pretty close to what you needed. For fun... I overachieved and gave you three knock patterns rather than the two you asked for. I also left a few notes in the code to explain how to extend the pattern count to any number -- limited only by the amount of RAM in your Arduino.At the end of the sketch is a function named validateKnock() that returns a bool indicating whether the knock pattern was accepted. I modified that function to search through an array of potential knock patterns and to return an integer code indicating which pattern was found, or 0 if none.I also added a few else-if statements to evaluate the returned value and to call the associated function and created a few placeholder functions for you to fill-in with your IFTTT GPIO calls.NOTE - The code allows you to reprogram the secret knock code. I did not extend this to work with more than just the first pattern in the list since there was only 1 programming button. To reprogram all of them, you'll need to add additional buttons and modify the code to pay attention to which one was pressed.Enjoy!Pat.