SMS is like email, usually quite fast, often nearly instant, sometimes takes forever.
Can you rely on the cell network to have coverage where the equipment needs to operate? I'd use a low freq unlicensed band and a simple radio, use the headset mic input on the phone to decode via a custom app. On Tue, Dec 29, 2015 at 5:59 PM, <[email protected]> wrote: > I need to haul some very small slow amounts of data up to 2000 feet. > I could do the garage door opener band but I want to display the data on a > smart phone. > > Not sure how realtime SMS might be. Cellular data modem modules are way > overkill. > Was thinking of just putting a cheap cell phone at one end and using bell > 202 format over it. I would have to write some kind of decoding app. > > But then you have your phone tied up all the time you are using the > system. > Still like the SMS idea but need the data within a second or two of > transmission, not minutes (or hours in the case of my AT&T phone when it is > powered off. Sometimes takes up to 12 hours to receive SMS). >
