Quote Originally Posted by Kalind View Post
I'm doing a temperature control system. Pretty new to PIC programming. I have managed to display temperature on the LCD using an LM35 sensor and a 16 x 2 lcd with a 16F873. I want to add on a 4 x4 matrix keypad so that i can set setpoints to switch a relay and a low warning buzzer I have no idea how to program for the above mentioned add-ons. Please could someone help me. below is my code which will obviously need additions and a scematic of my circuit is attached . Please could somebody help me with this!!
Schematic for keypad connection to a PIC is talked about at the beginning of this thread. If you need a schematic, draw it up... Shouldn't be that difficult at all...dontcha think?

As far as the code goes, you've gotten this far (or have you? Ctrl-C/Ctrl-V)...
Why not write some code, doesn't even have to be real code, just talk yourself thru it, and type it out as you talk. After you see it written down, you just might be able to write the code yourself.