1. Prepare a RaspiOS SD card.

    I used the official RaspPi imager tool. Use 64-bit Bookwom (legacy). The Trixie distro has a massive wpa-supplicant bug that breaks initialisation of access points.

  2. (optional) Install waveshare touchscreen drivers/ config

Add the following lines to the config.txt file 

hdmi_group=2
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0
hdmi_drive=1
dtoverlay=waveshare-ads7846,penirq=25,xmin=200,xmax=3900,ymin=200,ymax=3900,speed=50000

Download the waveshare-ads7846.dtbo file . Copy the .dtbo file to the overlays directory (/boot/overlays/).

Waveshare wiki page LINK

  1. Install bluetooth drivers.
sudo apt update
sudo apt upgrade
sudo apt install bluez bluetooth
sudo systemctl enable bluetooth
sudo systemctl start bluetooth
  1. Set Bluetooth controller transport mode to BLE only.

Open the bluetooth config file.

sudo nano /etc/bluetooth/main.conf

Find the line with :

#ControllerMode = dual

Replace with:

ControllerMode = le
  1. Check for soft/hard blocks.
rfkill list bluetooth

If any are blocked, run :

sudo rfkill unblock bluetooth

Restart Bluetooth.

sudo systemctl restart bluetooth
  1. Create a WiFi access point.
sudo nmcli con add type wifi ifname wlan0 mode ap con-name "AssetManAP" ssid "AssetManAP"
sudo nmcli con modify "AssetManAP" wifi-sec.key-mgmt wpa-psk
sudo nmcli con modify "AssetManAP" wifi-sec.psk "12345678"
sudo nmcli con modify "AssetManAP" 802-11-wireless.band bg
sudo nmcli con modify "AssetManAP" 802-11-wireless.channel 6
sudo nmcli con modify "AssetManAP" ipv4.method shared
sudo nmcli con modify "AssetManAP" ipv4.address 192.168.4.1/24
sudo nmcli con modify "AssetManAP" ipv6.method disabled
sudo nmcli con up "AssetManAP"
sudo nmcli con modify "RaspberryHotspot" connection.autoconnect yes
  1. Create a virtual Python environment. Install python libraries.
python3 -m venv ble_env
source ble_env/bin/activate
pip install "qrcode[pil]"
pip install bleak