Chime NG

Local Wi-Fi and MQTT firmware for the CC3200 / TLV320DAC3100 Ring Chime. Reuse the original processor, DAC, amplifier, speaker and antenna with a simple web interface and no Ring account or cloud service in the application.

This is an experimental project for the board shown below. It is not a firmware for every product sold as a Ring Chime, and is not affiliated with Ring, Amazon or Texas Instruments. Compare your hardware before proceeding.

Why

This project started after replacing a Ring doorbell with a locally controlled system. The goal is to keep using the Chime's existing Wi-Fi hardware and speaker as a local sound alert for home automation.

What it does

• Plays a sound through MQTT or the web interface.
• Lets you configure Wi-Fi, MQTT and volume in your browser.
• Accepts your own WAV sound uploads over Wi-Fi.
• Updates firmware through the web interface.

Build 0.2.1 has been validated on the board shown above. Physical blue LED operation remains unresolved. See validation and limits.

Start here

1. Read hardware preparation and contact points, including the separation of mains power from the low-voltage bench setup.
2. Follow build instructions.
3. Follow initial UART installation.
4. Configure Wi-Fi and MQTT through the web interface, then use the MQTT contract.

For a local build on macOS or Linux, install Python 3.11 or later, Git, and Clang (for the offline tests), then run from this directory:

python3 -m venv .venv
.venv/bin/python -m pip install -r requirements.txt
.venv/bin/pio run
.venv/bin/python -m pip install -r tools/requirements.txt
.venv/bin/python tests/run.py

The artifacts are in .pio/build/chime-en/. For first installation, follow the UART installation guide. For later firmware updates, rebuild with PlatformIO and upload the generated .chime file through the device's web interface. The setup password is generated at .pio/build/chime-en/setup-password.txt; keep that file private.

Repository layout

Path	Purpose
src/, include/, linker/	Application, bootloader and hardware drivers
platformio.ini, platforms/cc3200/	Pinned ARM toolchain and SCons build graph
vendor/ti/	Unmodified, pinned TI driver and SimpleLink source subset
web/en.html, locales/en.json	English UI and HTTP messages selected at build time
assets/chime.wav	Synthesized default sound
tools/	UART first installation and recovery, plus their dependency list
tests/	Offline runner, local UI fixture and simulated UART/storage/network/peripheral faults
docs/	Wiring, first flash, runtime configuration and useful findings

Initial flashing replaces the original startup firmware; no factory restore procedure is provided.

License

Chime NG firmware and project material are MIT licensed. TI sources retain their BSD-style notices. The separate Python UART tools use GPL-2.0-or-later to remain compatible with cc3200tool. See third-party notices and redistribution guidance, especially before distributing firmware binaries or TI programming helpers.