A simple script which uses a momentary push button connection between ground and a user definable gpio pin to toggle between wifi client and wifi hotspot mode, it uses a config file which contains the SSIDs and passphrases of the 2 networks. It allows you to change config parameters, run scripts etc.. on the raspberrypi through ssh using hotspot without the need for a router and then once done you can change it back to a normal wifi network

Modes: 1 = wifi client mode - connects you to a wifi router 2 = wifi hotspot mode - your raspberrypi acts as a "router" Change the default mode in the config file.

I use network manager to do this, running well on my raspberry pi zero w 2 on raspbian bookworm.

There are 2 versions of the code, the basic version which will work out the box is the one without the SSD1306 suffix. However to use the version with SSD1306 you gotta follow these instructions and install adafruit circuit python on the raspberrypi: https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/circuitpython-raspi then after activating the virtual environment follow these steps to use the SSD1306: https://learn.adafruit.com/monochrome-oled-breakouts/python-setup

if you intend to use the SSD1306 version and want to run the programme at startup , I used ~/.bashrc to start the virtual environment, and to start the programme I used systemd, steps to follow, replace $USER with your username:

1. create a bash script

/home/$%USER/startcircuitpythonenv.sh

2. copy the following into the file and save

#!/bin/sh source /home/rpz21/env/bin/activate echo started circuitpython environment

3. sudo nano ~/.bashrc and append this into the end of the file

if [ -f ~/startcircuitpythonenv.sh ]; then . ~/startcircuitpythonenv.sh fi

4. create a bash script to run the toggle_HS_client_SSD1306.py code called runoled.sh and past this into it:

#!/bin/bash sudo /home/$USER/env/bin/python /home/$USER/toggle_HS_client_SSD1306.py

5. create a systemd service to run this code

sudo nano /etc/systemd/system/startoled.service

6. past this into the service and save

[Unit] Description=begin HS <=> wifi client serivce

[Service] Type=simple ExecStart=/usr/bin/bash /home/$USER/runoled.sh Restart=always

[Install] WantedBy=multi-user.target

7. sudo systemctl enable startoled.service
8. sudo systemctl daemon-reload
9. sudo systemctl start startoled.service to check that its working

If you want to use the power and oled saving mode use "toggle_HS_client_SSD1306_power_save.py", this will turn the display off after 20 seconds, press once to wake the display, pressing again will toggle the modes. I recommend using this version because it preserves the OLED from burn in. Note that you'll have to press the button for at least a second

All the best :)