GB Printer emulator

GB Printer emulator based on ESP32.

Configuration and build

Configuration used for development:

• FireBeetle 2 ESP32-E IoT
• ESP-IDF v5.4.3
• Linux Mint 21.3, Fedora Linux 42, Debian 13.

idf.py build
idf.py flash
idf.py monitor

Pinout

Wire color may vary.

• pin 4 - Tx - yellow
• pin 12 - Rx - green
• pin 17 - clock - orange
• ground - black

WARNING

Logic level converter might be required. GB use 5V voltage, while ESP32 works with 3.3V. I take no responsibility for fried devices.

My personal GB Pocket outputs 3.5V and I didn't encounter any issues without logic level converter.

Usage

Device is configured as an access point with SSID: gb-printer, password: gb-printer.

Once connected - access device using http://gb-printer.local/.