Graviton is a golang web application for receiving, saving, and displaying time-series gravity readings from wireless hydrometers.
Gravity is a Vue.js web front end for Graviton. Pendulum is an Arduino/ESP-8266-based tilt hydrometer, small enough to fit through the neck of a glass carboy, designed to work with Graviton.
Graviton will also eventually support the iSpindel tilt hydrometer.