I have built up the DropController as per your circuit, and I must appreciate the work you have put up in making the whole thing so user friendly. Everything works like a charm. However, I would like to request a feature in your android app. It would be really helpful, if there is a pause button, once you have activated the drop sequence. In case I need to make changes to camera or flash settings, or any other changes in the setup, it requires to restart the entire drop sequence from the first settings, which is kind of painful. Since I don’t have any programming experience, can you please find a way to accommodate this in your latest version of drop controller. FYI, I am using the bluetooth version of the DC. Thanks again, for this wonderful website.