Drop-in Bluetooth retrofit for the NES Advantage (NES-026), the heavy stick-and-buttons arcade controller from 1987. An ESP32-C3 reads the original switches and transmits them as standard Bluetooth LE HID. No driver, no proprietary receiver. Turbo and slow-motion still work.

Still feels like an NES Advantage. Just doesn’t have a cord.

Firmware and PCB are open source. If you’d rather build one yourself, schematic, gerbers, BOM, and install guide are on GitHub. If you’d rather skip the soldering, kits and pre-installed units ship from the workshop.

The 8BitDo Retro Receiver is not supported: it speaks classic Bluetooth, this speaks BLE. BLE is what modern phones, tablets, and SteamOS expect.