1

I require a fast reliable method of sending control commands (simple data, possibly only a few dozen possible commands) to a remote system which is using a smartphone* as its onboard computer. I have deemed standard data packages used for mobile internet data transfer as too unreliable of control purposes, however I have noticed that once a voice call is initiated it is much more reliable. Has there been any development into sending data between phones across a connected call, and if not are there any known reasons a modified dialup modem in software form couldn't be used?

Furthermore, could this protocol be robust enough to send back low res video and other simple numeric data?

*Smartphone - A phone with significant processing power and ability to run custom programs (most likely with an Android based OS however am open to suggestions)

nwalke
  • 3,170
  • 6
  • 35
  • 60
Jordan
  • 11
  • 1
  • 3
  • Not many standard Android devices allow you to record the audio from the phone call: http://stackoverflow.com/questions/3370278/record-phone-calls-on-android-phone But, it sounds like you might be able to leverage custom hardware rather than standard handsets, which will be necessary. Then you should be able to devise an audio-channel encoding scheme that isn't too bad. – mchang Dec 12 '11 at 03:22

2 Answers2

0

Have you tried SMS? while you won't get video data it may work for small chunks of data. Also if the small chunks are from the phone to a server, you may try sending DTMF down the line (however I've yet to see that working. Other than that it's customised hardware.

  • see http://stackoverflow.com/questions/6342236/sending-dtmf-tones-over-the-uplink-in-call re DTMF –  Dec 14 '11 at 08:05
  • I guess however if your writing a custom app, you could play with the OS Code and remove the limitations noted in the above link. However doing so it way beyond me. –  Dec 14 '11 at 08:08
0

Hmmm...this reminds me of those old TV games like Hugo...there you had a voice connection and I think the commands were given by the different tone of the key pressed from 0-9. Maybe you should try something similar.

Alko
  • 672
  • 10
  • 21