Arduino not showing up as an available serial port

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This topic contains 2 replies, has 2 voices, and was last updated by  Casey 1 year, 7 months ago.

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    I have the kit and am just now getting the Arduino / Ramps up and running. However, when I connect it to my computer it doesn’t show up as an available serial port in Repetier or the Arduino IDE. I have a Arduino UNO on hand and when I connect it I can see the USB modem1421 in both Repetier and the Arduino IDE. When I power up the mega/ramps I get two flashes on the green LED next to the 1K resistor on the ramps and there is a red led lit up on the mega and that it all.

    EDIT: I removed the ramps board from the mega and just connected it via usb and it powers up but still doesn’t show up as a com port. It has the ON and L led’s lit up and that is all.

    Any help is much appreciated.




    You need to change the baud rate in the firmware by half I believe. I am not positive of the number. I don’t have a mac, and there have only been 1 or 2 mac users.

    Try this

    Motors not responding to all manual controls



    Nope, the Mega was toast. I overnighted a new one in from Amazon $17.00 (awesome) plugged it in and it works. Tried the one from the kit on a PC this AM and same result.

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