Looking back at the schematic I realize that it differs from the specific commands I listed. That was due to using a different port on each unique test. I started with the GPIO ports on the diagram. I ended up at pin 38 (GPIO 20). I changed ports in case a previous test compromised the port itself. ...

Am attempting to use one of the GPIO pins as an input to detect a button push and it is just not working. Have read thru 100+ postings here and just as many tutorials and have used multiple GPIO ports to attempt this. Have no issues controlling OUT setup and driving relays, LEDs etc. From 2015-11-21...