ex-current-sensor-stack

Reference implementation for the Current Sensor Tutorial on the RelayX docs site.

An ESP32 reads current, voltage, and power from an INA219 sensor and publishes the readings to a React dashboard over RelayX. The dashboard displays live values and controls a relay on the device through two RPC endpoints.

Layout

• device/ — ESP-IDF C++ firmware for the ESP32
• dashboard/ — React + Vite app

Dashboard components

The dashboard contains two kinds of components:

Component	Role
TopBar, DeviceCard, EventsAlerts, SampleRateDialog, Toast	Full-featured production UI used by the main App.
LiveChart, SessionButton, SampleRateForm	Minimal reference components used in the tutorial. They show the RelayX integration pattern without the styling chrome. Not imported by the main App.

If you're following the tutorial, the reference components are the files to copy and adapt into your own project.

Running

See the tutorial for setup and credentials. Once configured:

# Device
cd device
idf.py build
idf.py -p /dev/cu.usbserial-110 flash monitor

# Dashboard (in a separate terminal)
cd dashboard
npm install
cp .env.example .env.local   # fill in your RelayX keys
npm run dev