firmware: discard partial RS485 echoes

2026-07-17 02:47:13 -06:00
parent 75845a18e3
commit d5578ce796
3 changed files with 5 additions and 1 deletions
@@ -89,7 +89,9 @@ void pollRs485Commands(HardwareSerial& serial, const ImuState& imu) {
        StaticJsonDocument<192> request;
        DeserializationError error = deserializeJson(request, commandBuffer);
        commandBuffer = "";
-        if (error) { publishCalibrationResult(serial, "invalid_json"); continue; }
+        // Partial self-echoes and line noise are not commands. Dropping them
+        // silently avoids turning one bad fragment into a response/echo loop.
+        if (error) continue;
        String type = request["type"] | "";
        // Some RS485 boards echo transmitted frames into RX. Ignore our own output.
        if (type == "sensor_status" || type == "calibration_response") continue;