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Post: If the IO Pi is powered separately from the Raspberry Pi then it will continue in the same state as it was running in when the Raspberry Pi powered down, you have to remove the power to the IO Pi Plus as well for it to reset to its default state. The picture below shows the two ways you can connect inputs to the IO Pi Plus. The 5V input option should be how you have the inputs wired at the moment. In this mode, you will need to make sure the internal pull-up resistors are disabled. If the button is connected to ground like in the second schematic then you need to enable the internal pull-up resistors and the inputs will show high when the button is open and go low when the button is pressed. You can get around this by using the invert_pin() or invert_port() methods in the python library to invert the inputs so 1 becomes 0 and 0 becomes 1. That way when you press the button and short the pin to ground it will register the input as going high. The 1K and 500R resistor values are not critical as they are only there to limit the current being fed to and drawn from the IO Pi inputs in the event that the pins are accidentally set as outputs. As long as the resistors limit the current to less than 20mA it should be fine. [img]/docs/forumpost/jkukqo1.png[/img]