Vigie

About

Mon, 01 Jan 0001 00:00:00 +0000

Tadorne designs marine instruments. Vigie is published as a reference design: its sources are open, so that it can be rebuilt.

Everything published is signed with a single GPG key, anchored in the DNS of tadorne.org:

Privacy — Tadorne app

Mon, 01 Jan 0001 00:00:00 +0000

The Tadorne iPhone app displays the readings that Vigie nodes advertise over Bluetooth Low Energy.

No data is collected. The app has no account, no analytics, no advertising, no tracking and no third-party SDK.
Nothing leaves the phone. The app makes no network request. It only listens to Bluetooth advertisements; it never connects to a device.
What is stored, and where. Readings received while the app is open, the names given to nodes, and their Bluetooth addresses are kept in the app’s own storage on the phone. BTHome encryption keys entered by the user are kept in the iOS keychain. Deleting a node, or the app, erases them.
Bluetooth permission is used only to receive Vigie advertisements.
Export. A CSV export is created only when the user asks for it, and goes only where the user sends it.

Questions: contact@tadorne.org

Registering interest

Mon, 01 Jan 0001 00:00:00 +0000

Vigie is the energy node board: an ESP32 and an INA226 that measure a small sailboat’s battery, upstream of the main switch, down to a few microamps — enough to last a whole winter layup without draining the battery.

Technical documentation

Mon, 01 Jan 0001 00:00:00 +0000

Vigie is a single board that measures the energy of a sailboat or a 12 V battery pack, keeps watch all year and reports. It replaces the “ESP32 devkit + INA226 module + LM2596 converter” stack with an 86 × 54 mm four-layer board, and sits upstream of the main switch — the one module that stays alive through the winter: its converters draw 22 µA per stage, and the whole board stays below a milliamp.

The design

Mon, 01 Jan 0001 00:00:00 +0000

Vigie is not drawn by hand. Its schematic, footprint placement and routing are produced by scripts kept with the design, so the same command rebuilds the same files.

The project

Mon, 01 Jan 0001 00:00:00 +0000

The problem

A battery goes flat while the boat is left alone. The usual causes — an instrument still wired live, a converter that never sleeps, no recharge at all — are invisible from the quay.