Rusty Power Meter

A little Rust binary which reads out power metrics over SML over USB and stores it into a SQLite database.
The binary also hosts a REST-API on Port 3000 which allows reading out the live metrics and querying stored metrics using SQL statements.

Project Status

I developed this project over just two weekends in March 2024 and it is not finished nor maintained. It still runs on my Raspberry Pi after 4+ months and no restarts though, so I think it is useful enough to be shared.

Quick Start

1. Place the binary on a device which is connected to a USB IR reader which reads the power meter.
2. Check the device path of the USB IR reader (e.g. /dev/ttyUSB0).

./rusty-power-meter list-ports

3. Start the binary with the device path.

./rusty-power-meter start --path /dev/ttyUSB0

4. Enjoy

Server

The REST-API is hosted on Port 3000. The following endpoints are available:

• GET / - Shows status of the server
• GET /now - Current metrics
• GET /api/now - JSON formatted metrics
• POST /api/query - Query metrics using an SQL statement in the body. (readonly)

Database

Available columns:

• MeterTime
• Timestamp
• MeterReading
• LineOne
• LineTwo
• LineThree

Build

1. Setup cross-rs: https://github.com/cross-rs/cross/blob/main/docs/getting-started.md
2. Compile:

cross build --target aarch64-unknown-linux-musl --release