dashboard: expand CAN diagnostics

2026-07-26 14:49:19 -06:00
parent 6d61078484
commit ed9611310e
2 changed files with 107 additions and 3 deletions
@@ -75,3 +75,14 @@ The dashboard uses field-filtered `/api/v1/status` calls:
 - Slow poll: `/api/v1/status?fields=network,system,config`

 This keeps the endpoint model simple while reducing payload size, JSON parsing, and UI churn.
+
+## OBD-II / CAN Diagnostics
+
+The hidden diagnostics overlay distinguishes raw CAN traffic from parsed
+OBD-II coolant responses. It reports request successes and failures, total
+raw frames received, the last frame identifier and DLC, TWAI queue depth,
+controller error counters, missed or overrun frames, arbitration losses,
+and bus errors.
+
+Raw RX activity confirms that the display is receiving CAN frames even when
+the vehicle does not return a matching Mode 01 PID 05 coolant response.