A relay for the Tilt hydrometer. It reads the Tilt's Bluetooth LE broadcasts and sends them via WiFi to Brewfather.
This probably only works with the Tilt Pro since the regular Tilt has different sensor precision and I don't own a regular Tilt to test with. However, the changes to support a regular Tilt should be minor.
This is running on an Adafruit ESP32-C3 QT Py, but can run on any ESP32-C3 since it uses no GPIOs, only the Bluetooth and WiFi built in to the MCU.
The binary is no_std, so it runs on the bare metal microcontroller.