Trouble with external power on Micro

Development Tools IDE 1.x
1

Hi all,

I have a working program on a Micro logging a couple values from pots and recording it to an SD card. My problem is when I disconnect it from the computer and run from external power (12V through Vin), it will not run. The RX LED will light and that's all the activity that happens. There is no Serial code in my program.

Finding info is a bit difficult with the name Micro. I did stumble across someone who mentioned the RX line, when disconnected, receives some trash and thinks there could be more. They say to add a 10k to ground, which I tried, with no effect.

Any help is appreciated.

2

I think the problem I am running into is related to the bootloader. I believe it is waiting on serial communication from the computer. Although if this holds true, it's very poorly documented for a newbie trying to power a board externally which I would think would be common.

Am I on the right track if I get rid of the bootloader so it runs my code right away and not creating the virtual serial port and hanging?