control anything from a cell phone
Tiny Planet: a planet-wide, wireless I/O port
a joint project with AVR guru Claudio Lanconelli (http://www.lancos.com)
Tiny Planet is small device connected to a GSM cell phone. When the mobile receives a predefined SMS (text message), like "Activate burglar alarm" or "Start backup pump", the circuit automatically recognizes it as a command, and switches the output port accordingly. Besides switching the port on or off, the user can pulse it for a short period (e.g. “Reboot remote server”).
The device can be used as well to
notify the status of the input port, sending automatically a message
every time the input changes (e.g. "Warning, intrusion detected", "Insufficient
level in Tank #5”).
To know input status at any time, the device can send back a SMS based on the status of the input, as a response to a request message.
Tiny Planet gets the most out of
a 8-pin microcontroller an is remarkably simple. Text messages are customizable
(despite of using less than 512 instructions of assembler code) and is simple
to use: ways simpler than most GSM modems...
Even if you're not interested in building it, the article is worthing to read in order to learn more about how to connect a GSM phone to a microcontroller and how to send, receive and analyze SMS messages.
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