feat: add addressable RGB LED status display system

bootstrap/bootstrap_pi.sh

@@ -44,6 +44,8 @@ else
     echo "Run manually: sudo ${SCRIPT_DIR}/install_publisher.sh $REPO_DIR <url> <key>"
 fi
 
+"${SCRIPT_DIR}/install_led_service.sh" "$REPO_DIR"
+
 echo ""
 echo "=== Bootstrap complete for ${BENCH_NAME} ==="
 echo "Config: /etc/hil-bench/config.yaml"

bootstrap/install_led_service.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Install the LED daemon service.
+# Idempotent — safe to re-run.
+#
+# Usage: sudo ./install_led_service.sh <repo-dir>
+set -euo pipefail
+
+REPO_DIR="${1:?Usage: $0 <repo-dir>}"
+VENV="/opt/hil-bench/venv"
+SYSTEMD_DST="/etc/systemd/system"
+
+echo "--- Installing LED service ---"
+
+# Install rpi_ws281x into venv
+if [[ -d "$VENV" ]]; then
+    echo "Installing rpi_ws281x package..."
+    "${VENV}/bin/pip" install --quiet "rpi_ws281x>=5.0"
+else
+    echo "WARNING: venv not found at $VENV — run install_python_env.sh first"
+fi
+
+# Install systemd unit
+UNIT_SRC="${REPO_DIR}/systemd/hil-bench-led.service"
+if [[ -f "$UNIT_SRC" ]]; then
+    cp "$UNIT_SRC" "${SYSTEMD_DST}/hil-bench-led.service"
+    systemctl daemon-reload
+    systemctl enable hil-bench-led.service
+    echo "Installed and enabled: ${SYSTEMD_DST}/hil-bench-led.service"
+else
+    echo "WARNING: Service file not found: $UNIT_SRC"
+fi
+
+echo "--- LED service install done ---"
+echo "Start with: sudo systemctl start hil-bench-led"

bootstrap/update.sh

@@ -51,7 +51,17 @@ echo "--- Refreshing health timer ---"
 echo "--- Refreshing udev rules ---"
 "${SCRIPT_DIR}/install_udev_rules.sh" "$REPO_DIR"
 
-# ── 6. Done ──────────────────────────────────────────────────────────────
+# ── 6. Refresh LED service ───────────────────────────────────────────
+
+LED_UNIT_SRC="${REPO_DIR}/systemd/hil-bench-led.service"
+if [[ -f "$LED_UNIT_SRC" ]]; then
+    echo "--- Refreshing LED service ---"
+    cp "$LED_UNIT_SRC" /etc/systemd/system/hil-bench-led.service
+    systemctl daemon-reload
+    echo "LED service unit refreshed"
+fi
+
+# ── 7. Done ──────────────────────────────────────────────────────────────
 
 echo ""
 echo "=== Update complete ==="

configs/bench-config.example.yaml

@@ -30,3 +30,9 @@ paths:
 
 wiki:
   canonical_url: https://wiki.aharoni-lab.com/HIL/Bench/aharoni-samd51-bench-01
+
+led:
+  enabled: true
+  led_count: 16
+  gpio_pin: 18
+  brightness: 128

configs/config.template.yaml

@@ -58,3 +58,11 @@ paths:
 
 wiki:
   canonical_url: null            # optional wiki link
+
+led:
+  enabled: false                 # set to true to enable WS2812B LED strip
+  led_count: 16                  # number of LEDs on the strip
+  gpio_pin: 18                   # GPIO pin (PWM0)
+  brightness: 128                # default brightness (0-255)
+  fps: 30                        # animation frame rate
+  socket_path: /run/hil-bench/led.sock