Hi, I have been following this thread and mine still is not working. I am using the Osepp Uno R3 Plus that comes with the Osepp 101 Starter Kit Series, and I am doing all of this with my macbook running OSX 10.5.8. I tried all of the different Uno and Duemilanove options under "Tool - Board" with each of the USB serial port options. Looking at the chips on my board, I can see that I have an ftdi chip and a Mega328P chip. I installed the ftdi driver. I've tried hooking up the USB, Macbook, and board in different orders and resetting the board and installing the earlier 1.0.1 version of the IDE software. I'm trying to run the Blink sketch from this page on Osepp's site:http://osepp.com/learning-centre/start-here/uno-r3-plus/
I still get the "avrdude: stk500_rec(): programmer is not responding" problem when I upload the sketch. I'm getting a solid green "on" light by the reset button, and the L led by pin 13 blinks while the sketch is uploading, but then that same L led goes dark once the sketch finishes uploading. Does anybody have any ideas of what else I should try? Thank you for reading and thanks in advance for any help. Can anybody tell me what this error message means? What is the programmer that is not responding? I'm guessing based on other posts I've read that this is an issue with my macbook's software not recognizing the Uno correctly.