busware-esp32

⚠️ LEGACY — THIS IS NOT THE FIRMWARE WE SHIP

The firmware on current busware sticks is not built from this repository.

• USB-serial bridge — TUL (KNX-TP, NCN5130) and EUL (EnOcean, TCM515), the serial-transparent builds: built from USBSerial32 since August 2026. ESP-IDF, not Arduino. That is what the web flasher at https://install.busware.de/TUL/ installs, and what is flashed onto the sticks before they ship.
• Serial-to-network bridge — the wifi-transparent builds and the TCPBridge code here: superseded by cdc2net, a transparent USB-host-CDC-to-network gateway. That is what the web flasher offers for TUL and EUL today.

Simple/USBSerial, Simple/TCPBridge, lib/TCPBridge and the binaries under firmware/ are the older Arduino builds. They are kept for reference — please do not use them as a starting point for work on the shipped bridges.

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Arduino-based firmware for busware ESP32 sticks.