If you do require an eth0 network/internet routed access point as you have a RPi4, RPi3 B+, RPi3 or a RPi 1/2 with a wifi dongle then use my alternative script at Raspberry Pi - Auto WiFI Hotspot Switch Internet So this article is how to setup a Raspberry Pi so it can automatically switch between a network wifi connection and a non internet access point. I have done this in a previous script but, this is an updated process and more robust than my original script. I wanted a Raspberry Pi that connects to my home networks Wifi when I am at home or generates a wifi Access Point when I am out. When i am home I like to have my Raspberry Pi connected to the home network and the internet but when I am out I would like to connect to it using ssh via an access point using a tablet, phone or laptop. Works with Raspbian & PiOS - Bullseye, Buster, Stretch and Jessie.

Just for direct Wifi access to the PI when you are out and about. This is suitable for the Pi Zero W & Pi Zero 2 which have no LAN port or anybody who does not need an internet routed access point on a Raspberry Pi 3, 3B+ or 4. You can then use SSH or VNC on the move and switch between the hotspot and home network without a reboot.

A script to allow the Raspberry Pi to connect to a know wifi router or automatically generate a Non Internet Access Point if no network is found.

Raspberry pi zero wifi config