OpenWrt_WiFi_Client_Notification

Send a telegram notification every time a wifi client is connected / disconnected from your OpenWrt router.

Tutorial:

1. Create a telegram bot at https://t.me/BotFather Copy your BOT_TOKEN
2. Start your bot by sending it any message.
3. On your browser, go to: https://api.telegram.org/bot<YOUR_BOT_TOKEN>/getupdates you'll see something like this:

   {"ok":true,"result":[{"update_id":897000000,"message":{"message_id":2,"from":{"id":6341811111,"is_bot":false,"first_name":"500000","language_code":"en"},"chat":{"id":6341811111,"first_name":"500000","type":"private"},"date":1707224377,"text":"Test"}},{"update_id":897000000,
   

4. 6341811111 is your CHAT_ID. Copy that as well.
5. SSH to your OpenWrt router and do:

   touch /etc/config/telegram-bot
   uci set telegram-bot.mybot=wifibot
   uci set telegram-bot.mybot.token='YOUR_BOT_TOKEN'
   uci set telegram-bot.mybot.chat_id='YOUR_CHAT_ID'
   uci commit
   

6. Edit /etc/dnsmasq.conf and comment out the following line log-facility= so your /etc/dnsmasq.conf should look like this:

   #log-facility=
   

   Then restart the service: /etc/init.d/dnsmasq restart
7. Copy the script 98-client-join-notification to your OpenWrt folder at /etc/hotplug.d/dhcp/
8. Copy the script client-remove-notification.sh to your OpenWrt folder at /usr/bin/
9. Make both scripts executable:

   chmod +x /etc/hotplug.d/dhcp/98-client-join-notification /usr/bin/client-remove-notification.sh
   

10. Edit your OpenWrt crontab with the command crontab -e like this:

    * * * * * /usr/bin/client-remove-notification.sh
    

11. Restart your crontab:

    /etc/init.d/cron restart
    

12. DONE. Try turning your wifi off / on, you should see a notification on your telegram account.

Some Bugs:

1. When you reboot your router, you'll get a bunch of New device JOINED your network messages on telegram
2. When a device is removed from your network, it takes 1 minute to be notified on telegram

Screenshots: