Normalize primary communication around UART

2026-06-03 02:08:19 -06:00
parent 08a8275a29
commit b494a98de4
15 changed files with 64 additions and 54 deletions
@@ -8,7 +8,6 @@

 ## Required

- 2x MAX3485 RS-485 Modules
 - 4x DS18B20 Waterproof Sensors
 - 12V→5V Buck Converter
 - CAT5 Cable
@@ -17,8 +16,9 @@
 - Automotive Fuse Block
 - Assorted ATC Fuses

-## Future
+## Future / Optional Fallback

+- 2x MAX3485 RS-485 Modules, only if UART over CAT5 proves unreliable
 - Pi Zero 2 W
 - GPS Module
 - ELM327 OBD-II Interface
@@ -5,9 +5,10 @@ GPIO 17  Relay 2 (Fridge)

 GPIO 4   DS18B20 Bus

-GPIO 21  RS-485 TX
-GPIO 22  RS-485 RX
-GPIO 23  RS-485 DE/RE
+GPIO 21  UART TX to Pico over CAT5
+GPIO 22  UART RX from Pico over CAT5
+
+RS-485/MAX3485 is fallback only and not currently planned.

 GPIO 34  Ignition Sense