Hello! Just wanted to start by saying I am new to this but I do have a degree in programming. I have a cool project I would like to do but I am not sure how difficult it would be. I would like to use a sensor that could be programmed to send a text message or an alert to a phone when the sensor is tripped. The only problem is that if I ever wanted to sell the product I would need a way to get the text message or alert sent to the buyers phone and not my own. Would I need to create a phone app as well? I am also trying to think of a way that the sensor could be triggered to send the alert. Is there a way to program a senor to send an alert when something is no longer in contact with the sensor? It cannot be done with motion. Plus it has to be waterproof. I don't want to give my project idea away which makes this harder for me to ask for advice. Any advice or information would be greatly appreciated!! Thanks in advance!