update install, add led script

led_status.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+
+# green: gpiochip3 line 13 / LED1_GREEN (0 = on, 1 = off, active-low)
+# red:   gpiochip3 line 14 / LED2_RED  (0 = on, 1 = off, active-low)
+#
+# gpioset v2 holds the line until the process exits, so each LED is driven
+# by a background process. We kill and replace it to change state.
+
+CHIP=/dev/gpiochip3
+GREEN_PIN=13
+RED_PIN=14
+
+green_pid=""
+red_pid=""
+
+set_led() {
+    local pin=$1 val=$2 pid_var=$3
+    kill "${!pid_var}" 2>/dev/null || true
+    gpioset --chip "$CHIP" "${pin}=${val}" &
+    printf -v "$pid_var" '%s' "$!"
+}
+
+cleanup() {
+    kill "$green_pid" "$red_pid" 2>/dev/null || true
+}
+trap 'cleanup; exit 0' INT TERM
+trap cleanup EXIT
+
+# release any lines left held by a previous run of this script
+pkill -f "gpioset.*$CHIP" 2>/dev/null || true
+
+green_state=0  # start ON
+
+while true; do
+    green_state=$(( 1 - green_state ))
+    set_led "$GREEN_PIN" "$green_state" green_pid
+
+    if ping -q -c 1 -W 1 8.8.8.8 >/dev/null 2>&1; then
+        set_led "$RED_PIN" 1 red_pid
+    else
+        set_led "$RED_PIN" 0 red_pid
+    fi
+
+    sleep 2
+done