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Topic: Arduino Uno not retaining sketch on power-off (Read 4 times) previous topic - next topic

westfw

I think this is believed to be an instance of this bootloader bug:
http://code.google.com/p/arduino/issues/detail?id=446

Is this an Uno SMD ?  There have been reports that this is more likely to happen on those, though the explanation for that is not well understood.  Some vendors are replacing Uno SMDs with ones containing a patched bootloader.

Brychanus

Yes, this is an UNO SMD.  Thanks for pointing out this bug report! Is this something I can patch myself, or do I need to contact my vendor for a replacement?

westfw

#7
Jan 20, 2011, 06:09 am Last Edit: Jan 20, 2011, 06:12 am by westfw Reason: 1
Quote
Is this something I can patch myself

It seems to be something that requires actually replacing the bootloader.  If you have the equipment to do that (possibly as little as a second arduino), you can do it yourself (the newer bootloader hex is downloadable from the google code repository, or you can compile it yourself.)

(It's not clear that all Arduino vendors will have stock of "fixed" Unos or the ability to fix their existing stock, though.)

Brychanus

Thanks, folks.  Based on your info I found this thread on the SparkFun forums that matches my experience exactly:

http://forum.sparkfun.com/viewtopic.php?f=32&t=25611

I'll take it up with SparkFun from here.  I guess I'm glad it wasn't anything I was doing wrong.  Thanks again!

pluggy

I burned my UNO with the Duemilanove bootloader because of problems with Optiboot.  The IDE doesn't mind if I tell it its a Duemilanove.......

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