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1  Using Arduino / Networking, Protocols, and Devices / Bitbanged I2C dropin replacement for the Wire library? on: January 04, 2014, 09:58:52 pm
I've come across a number of I2C libraries that allows one to use pins other than A4 & A5 (or  pins D20 & D21).  But I have not found a library that was just a simple drop in replacement for the Wire library.

Does such a library exist?  I didn't see one here on the forum nor through Google.   

I know people will ask me "why would you want to do that!?!"   So to humor those who ask let's say I have an I2C "master only" device (non-Arduino) that I want to make work with I2C devices that happen to have Arduino libraries (an IMU, an LCD display, etc).   I can easily communicate from this master device to an Arduino but the Arduino can only act either as master or a slave via the Wire library; not both (at least that is my understanding).

But I would like this Arduino to act as both master and slave so I thought maybe I could use the Wire library to act as an I2C slave and a bitbanged dropin I2C Wire replacement library to make the Arduino act as a Master.

Performance luckily isn't an issue here.
2  Products / Arduino Yún / SD card will not mount on: October 04, 2013, 02:01:56 pm
I was wondering what the next step should be for debugging my problem. 

My Yun was working fine for the past week but suddenly it stopped auto mounting my SD cards.  When I ssh in and look at the /mnt directory nothing shows up.    I tried different SD cards, reformatting different cards, and even tried a brand new one, but none will auto mount (all fat32 format).  My PC can read all the cards fine so I am unsure what the problem is.

I also tried a complete reset (hold wifi button down 30 seconds) but that did not rectify the situation.

The Yun has no problem auto mounting a usb drive. 

Any advice appreciated.
3  Using Arduino / Programming Questions / Re: Storing sketchbooks in dropbox on: February 15, 2013, 05:29:30 pm
Been using dropbox for a while for saving arduino sketches across multiple computers.  There are no real gotchas and I also use it to share code with others.

I did use Google Drive but I'd have issues with it.  Sometimes it doesn't always sync all the files for me.  It's a shame because my Google Drive is much larger than my dropbox.

I am sticking with dropbox because it seems to always work.  If Google drive was as robust I would probably move over to it.

4  Community / Bar Sport / Re: Where do you buy your Arduinos? on: February 15, 2013, 03:44:13 pm
For parts never bought from Aztec but generally will buy from Mouser or Newark/Element 14.  

Sparkfun is one of those places that will easily over charge you if you are not careful.   Also always read the comments of their products. I find a lot of people end up pointing out deficiencies in their design which often leads them to coming out with a new version of their product somewhere down the line.

Not bad mouthing them, it's just the way it is.
5  Using Arduino / Programming Questions / Re: Writing Libraries on: February 14, 2013, 06:31:56 pm
Did you try the tutorial on the official Arduino website?

http://arduino.cc/en/Hacking/LibraryTutorial
6  Using Arduino / Networking, Protocols, and Devices / Re: how do i connect arduino uno wirelessly to my laptop? on: February 14, 2013, 06:21:00 pm
Personally I would use Xbee. 

Using Xbees is as simple as calling Serial.println().  If you are already sending data via USB I assume you are just making the same calls.

7  General Category / General Discussion / Re: Arduino Micro from eBay - reliable? on: February 09, 2013, 03:15:48 pm
The cheapest shipping to Croatia is 15 dollars, so no thanks.

eBay is my only option and I'm looking for reliable Micro or Lenonardo board.

Surprised you cannot simply order direct from Arduino in Ivrea, Italy.  You are not that far away from there.   They sell Micros for €18.
8  Using Arduino / Networking, Protocols, and Devices / Re: connecting 2 UNOs on: February 09, 2013, 11:37:37 am
The Big Bagpipe has a number of arduinos connected together  http://www.thebigbagpipe.com/home/concept

At one time there was a  "dual core" DIY Drone http://diydrones.com/profiles/blog/show?id=705844:BlogPost:40459

Someone also made an "ExtraCore library for Arduino"  http://hackaday.com/2012/08/31/dual-core-arduino-for-more-pins/
9  General Category / General Discussion / Re: Arduino Micro from eBay - reliable? on: February 09, 2013, 10:07:28 am
Adafruit sells a Micro for $25
http://www.adafruit.com/products/1086?gclid=CKKl9v--qbUCFQPd4AodLCEADg
10  Using Arduino / Programming Questions / Re: Using JavaScript to program arduino uno robotics project on: February 09, 2013, 09:37:06 am
Actually this was posted on Adafruit  recently  Arduino MK802 Based Mobile Web Server Robotic Platform Controlled via javascript with node.js http://www.adafruit.com/blog/2012/12/24/arduino-mk802-based-mobile-web-server-robotic-platform-controlled-via-javascript-with-node-js/
11  Using Arduino / Programming Questions / Re: Using JavaScript to program arduino uno robotics project on: February 09, 2013, 09:32:58 am
One way you could do this is to mount an Android phone that controls an Arduino.  The phone could also run a web server app that serves up all the html5/javascript/whatever goodness he desires.   

There are tons of examples of Arduino's being controlled by Android phones  (MIT for example:   http://appinventor.mit.edu/explore/stories/my-droid-robot-controlled-app-inventor.html)

Not saying this is the best way, its just a possibility.
12  Using Arduino / Installation & Troubleshooting / Re: WOW! You're gonna love this UNO !!!....or not. on: February 09, 2013, 08:49:18 am
Hey Learning can you post a pic of your Uno??  I am curious if it has the other 'features' of a fake arduino such as the chip markings sanded down.

You should return it to CE-Compass.  They have a 30 day return policy and a 15% re-stocking fee but if you prove it is a knock-off I think they might wave that (assuming they are reputable).   If you decide to return it let us know the outcome.

13  Using Arduino / Installation & Troubleshooting / Re: WOW! You're gonna love this UNO !!!....or not. on: February 08, 2013, 08:35:42 pm
Well, excuse me for posting.

My post wasn't directed at you.  Don't take it personal.  It's just if you have red led's you more than likely got a knockoff Arduino.

I'm all for Arduino clones... just not ones posing as "official Arduino".
14  Using Arduino / Installation & Troubleshooting / Re: WOW! You're gonna love this UNO !!!....or not. on: February 08, 2013, 07:35:51 pm
Red LED's did you say??   Play "Spot the Fakes" at Spotting Arduino Clones http://www.cmiyc.com/blog/2011/12/26/spotting-arduino-clones/

Here's a hint:

15  Using Arduino / General Electronics / Re: How Are Masters and Slaves designated in I2C and SPI connections? on: February 08, 2013, 07:11:59 pm
Don't we wish, maybe 100kHz smiley

Hate it when I do that.   smiley-red
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