I need to regulate a temperature using a PID regulator for heating and on/off switch for cooling. I have programmed the heating and cooling separately, but now I need to make it "in one" as full automatic. Is there any info on the Internet or any sample code?

 

Look for Duplex Control example in the following manual (link):

http://www.miinet.com/custservice/manuals/535_man.pdf

 

use a honeywell udc 3300 with the duplex control option

 

We (SMAR) make a panel mounted controller called CD600 that can do this.
http://www.smar.com/products/cd600.asp

Jonas Berge
SMAR
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www.smar.com