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Sanguinololu communication issues (4 replies)

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I bought a kit from someone who hadn't finished it and I don't know the state of the included sanguinololu board. The guy I bought it from thought it had at least a bootloader but was pretty sure it had marlin or sprinter firmware installed. The original source of the kit seems to have dissappeared and is not answering questions.

I have a windows 7 machine and started by installing the Arduino software and put the sanguino files into the hardware directory as instructed on the sanguino page.

I have several issues and I'm not sure which ones are real or which are from old documentation:
1. The Arduino page says that when you plug in the unit windows will fail to install a driver. That's not the case for me. Eventually it gets some usb driver to install.
2. I've tried installing an Arduino driver after uninstalling the default one windows chose, but there is nothing on the arduino list for sanguino. If I pick something generic looking from the list the device manager shows "Device cannot connect: code = 10" or something like that.
3. when I leave the default windows driver installed it looks better and I can pick the "sanguino ATmega644p" as the right board, then COM3, but when I try to upload the "blink" sketch as instructed on the Arduino windows page it comes up with the error "avrdude: stk500_getsync() : not in sync: resp=0xed" . I know this is a common one and I tried the trick of holding down the reset and I do have the reset jumper installed (although I eventually want to remove it so I can print from SD).

So, what's the scoop? Does the normal windows driver work now and I have a differnet issue? Or do I really need a sanguino driver that I don't know about. Is it possible that the boot loader is gone and I need to redo that somehow?

I have made a couple of modifications to the board, but I was very careful and tested everything afterword with my meter. I removed the 4 pin connector for the heat bed because I was bypassing it. I then connected a wire up to the FET that wil go to ground on the power supply. But that's it for board changes (I'm actually pretty good with rework being a hardware guy, it's the software/firmware/driver stuff that is likely the issue)

Thanks for any suggestions you can provide.

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