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set_low_latency.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+# Linux USB Serial Low Latency Setup Script
+PORT="${1:-/dev/ttyUSB0}"
+
+if [ ! -e "$PORT" ]; then
+    echo "[오류] 포트 $PORT 가 존재하지 않습니다."
+    exit 1
+fi
+
+DEV_NAME=$(basename "$PORT")
+LATENCY_PATH="/sys/bus/usb-serial/devices/$DEV_NAME/latency_timer"
+
+if [ -f "$LATENCY_PATH" ]; then
+    OLD_VAL=$(cat "$LATENCY_PATH")
+    echo "$OLD_VAL" | sudo tee "$LATENCY_PATH" > /dev/null 2>&1 || echo 1 | sudo tee "$LATENCY_PATH"
+    NEW_VAL=$(cat "$LATENCY_PATH")
+    echo "[성공] USB 시리얼 포트 $PORT 지연 타이머 변경: ${OLD_VAL}ms -> ${NEW_VAL}ms"
+else
+    # setserial fallback
+    setserial "$PORT" low_latency 2>/dev/null || true
+    echo "[정보] setserial low_latency 명령을 적용했습니다."
+fi