So is there a standard way to somehow send an email or massage alert indicating whenever a new device connects to the router? A message that says “New Device Connected” then tells you the MAC and IP address? I seen something on google about a bot or something someone made that does this and then sends you a message through Telegram but the instructions to set it up weren't all that clear. Anyone know what’s the best way to implement this kind of functionality into your OpenWRT router? Thanks
Normally you would get messages in syslog and use some syslog analysis tool to co-relate log entries - if the wifi connection in new or old.
Tools like OpenNDS can help you lock new devices isolated .