claude wifi monitor

gistfile1.txt

#!/bin/bash
# wifi-monitor.sh
# Logs Wi-Fi / network diagnostics once per run. Intended to be run every
# minute via cron so you have a timeline to look back on after an outage.
#
# Install on leota (or any of the affected Pis):
#   1. Copy this file to the Pi, e.g. /home/pi/wifi-monitor.sh
#   2. chmod +x /home/pi/wifi-monitor.sh
#   3. crontab -e   and add this line:
#        * * * * * /home/pi/wifi-monitor.sh
#   4. Let it run. After the next outage (or once you regain access),
#      read /home/pi/wifi-monitor.log and look at the entries right
#      before/during the time it was unreachable.

LOGFILE="/home/pi/wifi-monitor.log"
IFACE="wlan0"
GATEWAY="192.168.1.1"   # change if your UDM's LAN IP differs

{
  echo "=== $(date '+%Y-%m-%d %H:%M:%S') ==="

  echo "-- power_save --"
  iw dev "$IFACE" get power_save 2>&1

  echo "-- link --"
  iw dev "$IFACE" link 2>&1

  echo "-- station dump (signal, retries, tx/rx failures) --"
  iw dev "$IFACE" station dump 2>&1

  echo "-- interface state --"
  ip -4 addr show "$IFACE" 2>&1

  echo "-- neighbor/arp cache --"
  ip neigh show 2>&1

  echo "-- can leota reach its own gateway right now? --"
  if ping -c1 -W2 "$GATEWAY" >/dev/null 2>&1; then
    echo "gateway: OK"
  else
    echo "gateway: FAIL"
  fi

  echo "-- can leota reach the internet right now? --"
  if ping -c1 -W2 1.1.1.1 >/dev/null 2>&1; then
    echo "internet: OK"
  else
    echo "internet: FAIL"
  fi

  echo
} >> "$LOGFILE"

# Keep the log from growing forever - retain the last ~2 days at 1/min.
tail -n 2880 "$LOGFILE" > "$LOGFILE.tmp" 2>/dev/null && mv "$LOGFILE.tmp" "$LOGFILE"