Member Since: September 6, 2010

Country: United States

  • Hey, Sparkfun!

    Can we get a once-and-for-all statement regarding the wiring? Assume I am using an Uno, 5V (I’m not but let’s talk pins instead of acronyms just to avoid further confusion), here are my questions:

    Which pin on this board do I connect to Uno’s pin 13?

    Which pin on this board do I connect to Uno’s pin 12?

    Which pin on this board do I connect to Uno’s pin 11?

    Which pin on this board do I connect to the Uno pin I have nominated to be CS? I’m using pin 4.

    Which of these pins 4, 11, 12, 13 require level shifting?

  • Hmmmm - clicking the Datasheet link led to a bunch of unpleasant activity. I ended up with 20+ new windows opened and what not. Sparkfun, please store all reference material on your own server space so that we don’t have to visit more or less obscure external places of the cyber-world…

  • Here are some hints etc. for building a text message device using the SM5100B GSM.

  • Hey sparkies… remember your trip to Copenhagen last year? The rocket lifted today:
    Remind me - what’s the Sparkfun involvement, again?

  • GHTs? My iPhone got carried away w the spell-checking … meant to say “you guys…”

  • Nate, you GHTs are definitely in the shortcut business. Just don’t go too far so that it veckors TOO easy to cobble together a cool gadget or robot or whatever. The balance between “challenging ” and “possible” is perfect right now, I think.
    Here’s where the short-cutting falls short, though: ENCLOSURES! I’m tired of stuffing my creations in Altoid tins, cigar boxes or in the red SparkFun packaging material. The offerings from enclosure companies typically look rather 1985, so I wish there was a way to create exactly the box I need with any dimensions, any-shape openings and holes and what not. EAGLE for boxes, I guess.
    Anyway - good work, SparkFun! Back to roaming the real-world stores for a suitable box…

  • Yeah, maybe the board is faulty. Try writing a small sketch that captures and displays on your PC what’s received immediately after power on. As you know, there is a series of SIND messages sent from GSM to Duino at power on. The details of those may tell you what’s going on. <br />
    Or, are you saying that you have confirmed that no such messages are received? Write your own sketch to verify that - the sample sketch is a little dicey, if I remember correctly.

  • OK, so pin 2 is for traffic FROM the 5100 shield to Arduino’s “Rx” pin and the reverse for pin 3 to Arduino/Tx.<br />
    I mention it since the shield pin is marked “rx”, even though it is a TX pin, i.e. for traffic OUT FROM the GSM device. <br />
    The shield is marked up as the Arduino, which leads to this confusion.<br />
    <br />
    Anyway, maybe a dumb suggstion, but try switching the wires…

  • Which Arduino are you using? I had your problem until I realized that my Arduino Nano has flipped (compared to Uno/Duemilanove) which pin is Tx and which pin is Rx.

  • You’re exactly right. I am however not (for other reasons than this one) plugging the shield on top of the Arduino, so I have wires from the shield to pin 0/1 of the arduino. No USB from PC connected. When I upload new SW from the computer, I have to disconnect the shield (I made myself a little switch on those wires). It’s pretty crude, but faster than dealing with lost bytes and what not.
    I have succeded in using NewSoftSerial and pin 2/3 for shorter interaction, but when the AT commands are too frequent (or when the transported string is too long, I’m not sure), I don’t receive good data. So, I use pin2/3 plus PC via USB for validating commands and such.
    By the way, I have only used the TEXT version of the AT command set to send/receive SMS. The TCP/IP-ing may be a whole other ballgame, I’m not sure.

No public wish lists :(