Any ideas on how to accomplish this?
You have a good start, but it is important to understand what each part of the code does. Once you've gone through the code and understood the sections (feel free to post questions about the details to the forum), then you need to formulate a plan of action and write the code accordingly. The obvious outline for the main loop is
- read the temperature
- convert the temperature into a format suitable for Morse code (two digits, perhaps?)
- call the Morse code routines to transmit the temperature
- repeat