Document UART as primary communication method

2026-06-03 01:35:00 -06:00
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+# 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