Dave,

Are you getting anything from DEBUG, or is it just not showing any change in temp?

If DEBUG is showing a fixed value even when the temp changes, the sensor may be wired
wrong.

If you're using a boot-loader;

1. It most likely has the USART enabled, so you may need to disable the USART to use the
USART TX pin with DEBUG.

2. If your serial connection is through a MAX232 inverter, then you need to use mode 0
with DEBUG for non-inverted serial.

3. Most boot-loaders don't allow you to change config settings, so embedding them in your
code isn't necessary. And the loader might have some config settings different than what
you expect.