Shop OBEX P1 Docs P2 Docs Learn Events
AT Commands — Parallax Forums

AT Commands

djh82ukdjh82uk Posts: 193
edited 2009-04-16 15:48 in Propeller 1
Hi Guys

I have the chance to get hold of quite a few GSM/GPRS modems that support data/voice/sms etc.

They have a serial port that sends/receives AT commands.

How hard would it be to interface this with a prop? can the prop send and receive?

SMS messaging is obviously quite easy as you just sent it a series of commands, but for the data side of it, it would need some sort of networking stack/protocol to interface with anything?

Im just trying to figure out how much of the features can be used.

Thanks

DJH

Comments

  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-08-11 15:10
    You probably have to build an RS232 interface from a MAX3232, but you should be able to
    do just about anything with them from a Prop.

    This program might come in handy.

    Sounds like a good project. Let me know if you wind up with one too many. [noparse]:)[/noparse]

    OBC

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    New to the Propeller?

    Getting started with a Propeller Protoboard?
    Check out: Introduction to the Proboard & Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card connected? - PropDOS
  • djh82ukdjh82uk Posts: 193
    edited 2008-08-11 15:25
    ahh ok becuase the prop runs at 3.3v?

    thats not too bad then. I can get more of them (1000+), I am in the uk so they run on 900/1800MHZ.

    if your still interested pm me and I may be able to sort something out

    Thanks

    DJH
  • Ken PetersonKen Peterson Posts: 806
    edited 2008-08-11 15:47
    I'm working on a project that involves communicating with a GPRS cell phone/GPS module. It uses a 9600 baud UART interface which can be handled easily by the Prop. I have successfully sent and received/interpreted SMS messages with it. I wanted to try data, but the SIM card I have available is not on a data plan. The module I'm using does not provide the TCP/IP stack, so the Propeller would have to do that as well.

    If you get your hands on a bunch of them, I might be interested. Do you have any data sheets?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    ·"I have always wished that my computer would be as easy to use as my telephone.· My wish has come true.· I no longer know how to use my telephone."

    - Bjarne Stroustrup
  • Cluso99Cluso99 Posts: 18,069
    edited 2008-08-11 22:33
    If it says AT command set compatable then you should not need a TCP/IP stack.
  • djh82ukdjh82uk Posts: 193
    edited 2008-08-12 02:30
    I can get the data sheets for them yes, they are taken from some sort of fleet car solution, ive got a source for the antennas now aswell.


    They run on anything between 5v and 30v, and take power via a 4 pin micro-molex plug (the same as the 4pin motherboard plug on modern pc's), I don;t have access to it at the moment but I have all the at commands etc on a seperate datasheet, manuals, tech info etc.

    They are 1w I beleive

    DJH
  • Mike HuseltonMike Huselton Posts: 746
    edited 2009-04-16 15:48
    Are the GSM/GPRS modems still available?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    JMH
Sign In or Register to comment.