I am sorry but your reply is still not very helpful. In general I feel like this is an interrogation session in order to discover relevant information, making the whole process much more difficult than necessary. Please keep in mind that we know absolutely nothing about your system other than what you tell us, and if we instead substitute assumptions, that can lead us to wrong conclusions. In other words, please be more forthcoming with relevant information so we don't have to keep playing this cat and mouse game. @amkochaki said in V_VOLTGEM EXAMPLE: My motion sensores are the same of my alarm system. I don't think that you mentioned anything about what is your alarm system, how it works, etc. therefore this statement is meaningless (at least to me). Perhaps I missed something? @amkochaki said in V_VOLTGEM EXAMPLE: Are connected on analogic pins. Perhaps you are unaware, but the analog pins on the arduino can also be used as Genral Purpose Input Output (GPIO) pins, aka digital. So again, this statement still does not clarify whether your sensors are analog or digital... @amkochaki said in V_VOLTGEM EXAMPLE: So I need that Arduíno read voltage of the sensores. Yes, of course. But (at least to me) we still have not determined whether they are analog or digital... Both are measuring voltages, the question is how... Perhaps you are unfamiliar with difference between analog and digital? I don't like to assume anyone's knowledge level, which can lead to wrong conclusions. On the other hand, I don't want to insult anyone, either...