Pi Hotspot Injector
Turn a blank SD card into a Klipper 3D-printer controller that broadcasts its own Wi-Fi hotspot, from your Linux PC, with no keyboard or screen on the Pi.
Source-available · Non-commercial Linux desktop Pi 1 to Pi 5
What it does
1. Write the image
Downloads the official Raspberry Pi OS Lite, checks it, and writes it to an 8–32 GB SD card or USB stick, with two sanity checks and read-back verification.
2. Build Klipper
Installs Klipper, Moonraker, Mainsail (and Crowsnest for a webcam, or the experimental KlipPlug plugin manager) onto the card, compiled so one card runs on every Pi, even the Pi Zero.
3. Hotspot
Sets the Wi-Fi name, password and address, so the Pi makes its own network on first start. Ideal for a workshop with no Wi-Fi.
Clone & Backup
Save a finished card as an image and copy it to more cards. Each copy becomes a separate Pi with its own name and keys.
Dropout-proof downloads
10 MB checkpoints and automatic resume, so flaky Wi-Fi doesn't cost you an hour.
Safety first
Only removable 8–32 GB drives are offered. Your PC's own disks can never be picked.
Install
- On a Linux PC (Ubuntu, Linux Mint, Debian, Fedora…) make sure Tkinter is installed:
sudo apt install python3-tk - Download the project from GitHub (Code → Download ZIP) and unzip it.
- Double-click
PiInjector.desktop(choose Trust if asked), or runpython3 pi_injector.pyin a terminal. - Read and accept the short disclaimer, then follow the tabs left to right.