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When I start giving them the SMS commands I just get "error". It is well documented that phones only support a subset of the available AT commands and each phone can be different but what isn't well documented is what AT commands any individual phone supports. This is frustrating because I would like to use a cheap phone with great battery life and a very small screen (so as to not drain much of the battery on a screen that no one can see). I also thought that I would experiment with disconnecting the screen and trying the phone that way.
I am going to keep researching this. If I could get a phone that I already have working with SMS it would really cut down on the final cost of the project. My Motorola i425 seems like the best candidate.
Any comments are welcomed and appreciated.
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In Topic: River Rover (Floating Netduino with Communication)
08 October 2011 - 04:55 AM
Thank you for the replies! I have been doing some more research and it looks like one possible solution for the communication would be SMS using AT Commands. I could use a USB host shield to send AT commands to the phone. This would allow me to both read text messages and send them. It seems like a good cheap way to send information back and forth except that I can't get a phone to respond to the SMS portion of the AT Command set.
We happen to have two cell phones laying around that we no longer use. After hooking both of them up to a laptop I used hyper terminal to start blasting AT commands at them and both responded here an there. The one command that I really thought was cool was that command that asks for the current battery status. I can see that being good to know as the phone battery nears end of life. It will be no surprise when it stops sending messages. The mars rovers let NASA know their battery levels as well.
When I start giving them the SMS commands I just get "error". It is well documented that phones only support a subset of the available AT commands and each phone can be different but what isn't well documented is what AT commands any individual phone supports. This is frustrating because I would like to use a cheap phone with great battery life and a very small screen (so as to not drain much of the battery on a screen that no one can see). I also thought that I would experiment with disconnecting the screen and trying the phone that way.
I am going to keep researching this. If I could get a phone that I already have working with SMS it would really cut down on the final cost of the project. My Motorola i425 seems like the best candidate.
Any comments are welcomed and appreciated.
When I start giving them the SMS commands I just get "error". It is well documented that phones only support a subset of the available AT commands and each phone can be different but what isn't well documented is what AT commands any individual phone supports. This is frustrating because I would like to use a cheap phone with great battery life and a very small screen (so as to not drain much of the battery on a screen that no one can see). I also thought that I would experiment with disconnecting the screen and trying the phone that way.
I am going to keep researching this. If I could get a phone that I already have working with SMS it would really cut down on the final cost of the project. My Motorola i425 seems like the best candidate.
Any comments are welcomed and appreciated.
