Bambu_Monitor

• Python program to track Bambu printer usage trends in Google Sheets
• Uses Waydroid emulator, Android debugger (ADB), and Bambu Handy app

Components

• main.py - main thread
• job_store.py - dataclass for jobs
• controller.py - utility for screen control
• parser.py - utility for extracting screen information
• gspread_updater.py - utility for interacting with google sheets
• supervisor.py - Performs startup sequence and takes care of restarts
• waydroid-daemon.service - Daemon service to initiate launch on startup
• /BambuHandy - contains the android app
• /secret.zip - client secret for google service account (encrypted)

Raspberry Pi Setup instructions

1) Update

sudo apt update
sudo apt upgrade -y

2) Required OS Configuration

# Pressure stall information
sudo sed -i '/psi=1/! s/$/ psi=1/' /boot/firmware/cmdline.txt
# Page size of 4096
sudo grep -qxF 'kernel=kernel8.img' /boot/firmware/config.txt || sudo sed -i '1ikernel=kernel8.img' /boot/firmware/config.txt

3) Reboot

sudo reboot

4) Install secret using 3dFab password (iykyk)

unzip secret.zip

5) Install dependencies

sudo apt install adb curl lsb-release python3 python3-pip python3-venv -y
python3 -m venv handy_env
source handy_env/bin/activate
pip install -r requirements.txt

6) Install Waydroid

sudo curl -Sf https://repo.waydro.id/waydroid.gpg --output /usr/share/keyrings/waydroid.gpg
echo "deb [signed-by=/usr/share/keyrings/waydroid.gpg] https://repo.waydro.id/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/waydroid.list
sudo apt update
sudo apt install waydroid -y
sudo waydroid init
waydroid show-full-ui

7) manual step - enable debug mode on android and get android ip address

tap on the build number 7 times

ensure usb debugging is enabled (should be default)

ensure android timezone matches system time

8) Install Bambu Handy

unzip BambuHandy/'*.zip' -d BambuHandy
adb connect 192.168.240.112
adb install-multiple ./BambuHandy/*.apk

9) manual step - launch bambu handy and login

10) Create and start user daemon

• Note: replace USER in waydroid-daemon.service with username

# Copy service file to user systemd directory
mkdir -p ~/.config/systemd/user
cp -v waydroid-daemon.service ~/.config/systemd/user/

# Set permissions
chmod 644 ~/.config/systemd/user/waydroid-daemon.service

# Reload systemd user daemon and enable service
systemctl --user daemon-reload
systemctl --user enable waydroid-daemon
systemctl --user restart waydroid-daemon

# (Optional) Check status and logs
systemctl --user status waydroid-daemon
journalctl --user -u waydroid-daemon -f