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1  Using Arduino / Networking, Protocols, and Devices / GSM07.10 Serial Multiplexing (software) on: June 28, 2013, 06:41:53 am
I'm wondering if anyone has attempted GSM07.10 serial multiplexing on the Arduino.

I can't see any trace of it on the wonderweb, but I have found some Android C code...


Anyone got any idea if this could be ported to Arduino - is it possible? Will the work swamp the poor wee thing?

The protocol appears to be used quite a lot with 3G/GPRS/GSM modules, e.g. AT commands on one channel, NMEA output on another... so it could be pretty useful! Initially I'm only interested in getting it to run on the hardware serial port.

Would seem a useful library to have as could have other applications too I'd think.

Thoughts welcome (and/or solutions) smiley
2  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 12:53:56 pm
Ah - well there we go...

Shouldn't open standards be the best possible?

tee hee

Good on seeed! I shall await the Seeeduno anxiously smiley-wink
3  Forum 2005-2010 (read only) / Bugs & Suggestions / Re: Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 11:14:39 am
OK, thanks for the reply... as I suspected... I have to buy more stuff... smiley-sad or get creative...

I assume that the reason this wasn't corrected for the Uno was that backward compatibility with existing shields was required.

Perhaps some small updates to the next design could be made so that, if required, the header in question could be removed and re-soldered to an alternative position (along a bit, then either in or out by an appropriate amount for 2.54mm pitch). This would be enough, and would allow both backward compatibility and a more forward to a better standard. It looks to me like there just might be enough space to do this inwards and so avoid making the PCB wider, but I'm surely not an expect on these things.

I'll just leave this in the suggestion box and hope for the future...

Is this common to all Arduinos or is it just the Uno (and it's predecessor)?

As a PS on the above:
I've looked in more detail at the track layout and I suggest the easiest option would be having the alternative holes for the header sited 2.54mm inwards and about 1.25mm towards the IO0 end of the board. You could even pre attach the header there. smiley-wink
4  Forum 2005-2010 (read only) / Bugs & Suggestions / Arduino Uno - 2.54mm pitch compatibility on: January 13, 2011, 10:41:09 am
Love the Uno! smiley

But, if the 8 pin header for IO 8 to AREF was nudged just one pin towards "ITALY" it would be entirely compatible with 2.54mm pitch stripboard...

I can't see any reason why this couldn't be done (from looking at the tracks on the board) and I can even see a hole drilled into the board!

I now have a proper nightmare ahead of me to form this interface... smiley-sad

This seems such a simple little adjustment, and for a prototyping board I'd expect to see a lot of requirement to just "plug into" a board based on 2.54mm pitch.

I think I saw some posts related to the same problem on the Duemilanove?

Anyway - please consider this minor adjustment?

Oh, and if anyone has a clever way to overcome this that doesn't lots of cable please let know!
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