# UART CAT5 Pinout

## 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

## Notes

- Double conductors used for power
- Shared ground required
- Spare conductor reserved for future use
- Pair 3 may later be repurposed for RS-485