Regarding the DealExtreme Bluetooth module I came across this datasheet that has the same chipset and pinout with similar layout just a couple of SMD components in different places: <a href="http://www.cutedigi.com/pub/Bluetooth/BC4_Blue2.0_Datasheet.pdf">http://www.cutedigi.com/pub/Bluetooth/BC4_Blue2.0_Datasheet.pdf</a><br>
<br><div class="gmail_quote">On Tue, Aug 9, 2011 at 11:09 AM, David Churcher <span dir="ltr"><<a href="mailto:davechcr@dchurcher.com">davechcr@dchurcher.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On 8/08/2011 9:15 a.m., Richard Jones wrote:<br>
> I'm considering ordering this bluetooth board from Deal Extreme. I'm<br>
> hoping that it will provide short distance ttl serial comms to my<br>
> micromouse robot. Handy for testing acceleration and deceleration<br>
> without the encumbrance of cables.<br>
><br>
> <a href="http://www.dealextreme.com/p/wireless-bluetooth-rs232-ttl-transceiver-module-80711" target="_blank">http://www.dealextreme.com/p/wireless-bluetooth-rs232-ttl-transceiver-module-80711</a><br>
<br>
</div> I have a couple of these boards with different firmware, from<br>
Seeedstudio and Dfrobot. They work well enough, and have connected to<br>
every PC and Android device that I've tried. Occasionally they get<br>
disconnected and you have to cycle power on the board to be able to<br>
reconnect, but it doesn't happen very often. The pin spacing on the<br>
board is smaller than 0.1" so you have to solder wires to it or use a<br>
PCB. You can get them in a "Bee" carrier board from Seeedstudio, which<br>
is a bit easier to play with.<br>
<br>
Re the Nano, If you're looking for a really tiny and light Arduino the<br>
Seeeduino Film ($US19,<br>
<a href="http://www.seeedstudio.com/depot/seeeduino-film-p-689.html" target="_blank">http://www.seeedstudio.com/depot/seeeduino-film-p-689.html</a>) is pretty<br>
neat. Folded up it is only twenty-something millimetres square. You can<br>
even snip off the parts you're not using. It is a little more expensive<br>
than the Nano, but comes with a tiny LiPo battery and charger circuit.<br>
You do need a 3.3V USB-to-serial board to program it. It's only<br>
ATMega168 at 8MHz, the film is obviously a bit fragile, and I have<br>
managed to blow up the LED output pin somehow (I think by getting the<br>
DTR and ground wires crossed), but the rest of the board still works OK.<br>
<br>
Regards,<br>
<font color="#888888">David<br>
</font><div><div></div><div class="h5"><br>
<br>
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