tty2oled-gc9a01
web flasher

Turn an ESP32-C3 and a round GC9A01 screen into a full-colour MiSTer marquee. Flash it straight from the browser, no tools to install.

USB or WiFiFull-colour artWorks with tty2oled

Your board

This browser can't flash over USB. Use Chrome, Edge or Opera on a desktop (WebSerial is required). Serial access needs a secure page. Open this over https://.

Firmware version 0.5.3

How it works

Hold the BOOT button on the board, plug it into this computer with a data-capable USB cable, then let go. (The browser usually can't reset these boards into download mode by itself; this step is what makes it connect.)
Pick your board above, press Connect and install, then choose the serial port (it shows up as "USB JTAG/serial debug unit").
Wait for the flash to finish, then unplug and replug the board normally.

"Failed to initialize" or the port isn't listed? The board isn't in download mode: unplug it and repeat step 1 with BOOT held. Also close anything else using the port (serial monitors, the marquee web app) and make sure you picked "USB JTAG/serial debug unit", not another serial device.

After flashing

With no saved WiFi, the display starts an open tty2oled-XXXX network with a setup page. Press the BOOT button to show a QR code that joins it.
Manage the marquee art from the marquee web app over USB (WiFi works when you run the app locally, see the README).
Flashing keeps your saved WiFi and settings. When the installer asks, leave Erase device unticked; ticking it wipes them.

The real thing

Round display on its module — GC9A01 round display on a Super Mini

Super Mini with its onboard OLED — The onboard OLED shows status

Sunton board in a 3D-printed case — Sunton all-in-one in the printable case