arduino voltimeter

I need to create a simple device with few buttons and lcd display and whatch (with internall battery), where I could set time and date to turn a port on, setting also the time this port will continue on. After this time the port munt be turned off. The device also need to check tension (between 0 and 30 volts), logging the date/time the voltage get a preset tension. opperation: a) using the buttons, I would set the current time and date b) using the buttons, I would set the for each avaliable digital port number a name (e.g. "living room", "bedroom", etc) if the port is IN or OUT c) for ports set as OUT, I would set the time and date to ENABLE or DISABLE the port, and the time that it would keep ENABLE or DISABLE (after that the port would be inverted) d) for ports set as IN, just read and log the time and dathe the port signal was ON or OFF e) using the buttons, I would set the for each avaliable analogic port the max and the minimun voltage (between 0 and 30 volts) f) the device should log in memory if the voltage got this preset ammount on item "e" g) using the buttons, I would read the log on the display In order to facilitate construction I would prefer to use LCD with buttons already avaliable on the market.