# CAT5 Pinout

## Primary Configuration

UART over CAT5

Pair 1
Blue       +5V
Blue/White +5V

Pair 2
Orange       Ground
Orange/White Ground

Pair 3
Green       Pico TX -> ESP32 RX
Green/White Pico RX <- ESP32 TX

Pair 4
Brown       Ignition Sense
Brown/White Spare

## Future RS-485 Conversion

Pair 3

Green       RS-485 A
Green/White RS-485 B

All other conductors remain unchanged.