content: I did the same for a residential apartment block i managed for about 6 months. the planning permit for it passed as a hotel then the builders (Im looking at you hickory) bait and switched it to a housing block, so we had two towers of apartments all with these fucking things all maintaned with a 10 year old palm pilot that was apparently still worth some $1500 and nigh on irreplaceable. Those things are unbelieveably flaky, this does not suprise me one bit. The one that opened the main front door was in full sunlight all day then in cold wind at night, so multiple times weekly i would have to attend the site at stupid fucking o-clock in the morning because some the damn thing would lose 2 seconds as it cools down, go out of sync with the computers and shut down.