Slightly off topic:
Has anyone interfaced a PIC chip to a Radio Shack Digital Keypad model
# 49-452? The back of the keypad has +/- power connections, 4
possible address settings, and a Serial Data 1 and 2. Is this true
serial data? Which is input and which is output? Or is the data flow
I want to interface this keypad with a PIC 16c84 to control a home
alarm system. It seems like it would be easier to use this keypad
than to create one.
When powered up, the keypad signals that it's connection with the
alarm consule has been severed.....and it won't allow you to do
anything. So, I also need to know what signal needs to be sent to the
keypad to allow it to function.
Any help is greatly appreciated.