GSM doorbell
Man, now your house (which is wired) needs a SIM card for the doorbell…
First thing, let me stress one point : putting GSM everywhere is *not* the solution. If you want an object to start communicating, please think carefully about what you already have around as networks (Powerline, WiFi, GSM…), what you really need as service (speed, availability costs) and only when you have a clear sight make your choice.
Anyway, please welcome the GSM Doorbell
“The GSM-doorbell is a system that connects a visitor, who is ringing the doorbell, to the mobile phone of the homeowner. The homeowner is now able to speak to the visitor via the intercom system, and to open the door by entering a pin code on the mobile phone. The patented concept meets a need in accessibility, usability, security and comfort.”
I think that using the mobile phone to control your door opening is great… but that wouldn’t in any case require that the doorbell use GSM… it could easily share any available wired phone line.
