completly forgot about the 5 analogs pins.
Currently im using this setup
PIN | Setting | Use
5 Output Alarm
1 Output High for reed switch 1
2 Input digital Read for reed switch 1
3 Output High for reed switch 2
4 Intput Digital Read for reed switch 2
6 Output High for reed switch 3
7 Input Digital Read for reed switch 3
8 Output Control Pin for Motor Relay
13 Output Status LED
Total = 9 Pins
if i add 2 RFID Readers that another 6 Pins. The parrelax has a TX RX and Enable PIN
and then the 2 keypads totalling 7 Pins a piece for a 4X3 That adds another 14 pins.
Now im at 29 Pins
I dont know how to use shift resistors or multiplexing.
any help is greatly appreciated.
thank you in advance
I am using the UNO btw.